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Řezanka T, Lukavský J, Rozmoš M, Nedbalová L, Jansa J. Separation of triacylglycerols containing positional isomers of hexadecenoic acids by enantiomeric liquid chromatography-mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1208:123401. [PMID: 35921696 DOI: 10.1016/j.jchromb.2022.123401] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 11/19/2022]
Abstract
Triacylglycerols (TAGs) containing positional isomers of hypogeic (Hy), palmitoleic (Po), and palmitvaccenic (Pv) acids from three microorganisms (top-fermenting brewer's yeast Saccharomyces cerevisiae, green alga Coccomyxa elongata, and arbuscular mycorrhizal (AM) fungus Rhizophagus irregularis) were analyzed. Dozens of regioisomers and enantiomers of TAGs containing one, two or three hexadecenoic acids have been identified by means of reversed phase chromatography/mass spectrometry (RP-HPLC/MS). The regioisomers of TAGs containing two palmitic acids and any hexadecenoic acid were separated. Analysis of regioisomers of TAGs having one Pv residue showed that asymmetric molecular species such as PvPP or PPPv were dominant in Rhizophagus. TAGs were also analyzed on a chiral phase column and nine molecular species of TAGs containing two palmitic and any of three hexadecenoic acids were separated and identified. In the case of TAGs containing one palmitic and two hexadecenoic acids, the separation was successful only if the hexadecenoic acids were identical. Separation of TAGs containing three hexadecenoic acids was successful only if all three hexadecenoic acids were identical. Regardless of the type of TAG, it was found that TAGs in the AM fungus and containing palmitvaccenic acid bound at the sn-1 position of the glycerol backbone were dominant, suggesting similarity in the biosynthesis of the different TAGs. The covalent adduct chemical ionization method was used for identification of TAGs as adduct with (1-methyleneimino)-1-ethenyl ion, which reacted with double bond of the unsaturated fatty acid. Tandem MS thus makes it possible to identify TAGs containing various hexadecenoic acids.
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Affiliation(s)
- Tomáš Řezanka
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic.
| | - Jaromír Lukavský
- Institute of Botany, Czech Academy of Sciences, Dukelská 135, 379 82 Třeboň, Czech Republic
| | - Martin Rozmoš
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Linda Nedbalová
- Department of Ecology, Faculty of Science, Charles University, Viničná 7, 128 44 Prague 2, Czech Republic
| | - Jan Jansa
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic
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Structural Characterization of Mono- and Dimethylphosphatidylethanolamines from Various Organisms Using a Complex Analytical Strategy Including Chiral Chromatography. Symmetry (Basel) 2022. [DOI: 10.3390/sym14030616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two minor phospholipids, i.e., mono- and/or dimethylphosphatidylethanolamines, are widespread in many organisms, from bacteria to higher plants and animals. A molecular mixture of methyl-PE and dimethyl-PE was obtained from total lipids by liquid chromatography and further identified by mass spectrometry. Total methyl-PE and dimethyl-PE were cleaved by phospholipase C, and the resulting diacylglycerols, in the form of acetyl derivatives, were separated into alkyl-acyl, alkenyl-acyl, and diacylglycerols. Reversed-phase LC/MS allowed dozens of molecular species to be identified and further analyzed. This was performed on a chiral column, and identification by tandem positive ESI revealed that diacyl derivatives from all four bacteria were mixtures of both R and S enantiomers. The same applied to alkenyl-acyl derivatives of anaerobic bacteria. Analysis thus confirmed that some bacteria biosynthesize phospholipids having both sn-glycerol-3-phosphate and sn-glycerol-1-phosphate as precursors. These findings were further supported by data already published in GenBank. The use of chiral chromatography made it possible to prove that both enantiomers of glycerol phosphate of some molecular species of mono- and dimethylphosphatidylethanolamines are present. The result of the analysis can be interpreted that the cultured bacteria do not have homochiral membranes but, on the contrary, have an asymmetric, i.e., heterochiral membranes.
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Vítová M, Stránská M, Palyzová A, Řezanka T. Detailed structural characterization of cardiolipins from various biological sources using a complex analytical strategy comprising fractionation, hydrolysis and chiral chromatography. J Chromatogr A 2021; 1648:462185. [PMID: 33984647 DOI: 10.1016/j.chroma.2021.462185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/16/2021] [Accepted: 04/18/2021] [Indexed: 12/14/2022]
Abstract
Cardiolipins (1,3-bis(sn-3'-phosphatidyl)-sn-glycerol) (CLs) are widespread in many organisms, from bacteria to higher green plants and mammals. CLs were observed in Gram-positive bacterium of the genus Kocuria, brewer's yeast Saccharomyces, the green alga Chlamydomonas, spinach and beef heart. A mixture of molecular species of CLs was obtained from total lipids by hydrophilic interaction liquid chromatography (HILIC), and these were further separated and identified by reversed phase LC/MS with negative tandem electrospray ionization. The majority of CLs molecular species from each organism were cleaved using phospholipase C from Bacillus cereus. This phospholipase cleaves CLs into 1,2-diglycerols and phosphatidylglycerol 3-phosphates, which were then separated. After CLs cleavage, diacylglycerols such as sn-1,2-diacyl-3-acetyl-glycerols (i.e., triacylglycerols) were separated and identified by chiral chromatography/MS-positive tandem ESI. Significant differences in the composition of the molecular species between the 3-(3-sn-phosphatidyl) and 1-(3-sn-phosphatidyl) moieties of CLs were found in all organisms tested. Molecular species of CLs that contained four different fatty acids were identified in all five samples, and CLs containing very long chain fatty acids were identified in yeast. In addition, CLs containing both enantiomers (at the sn-2 carbon) were present in the bacterium tested. These findings were further supported by data already published in GenBank where, in the same family - Micrococcaceae - both enzymes responsible for chirality in the sn-2 position, glycerol-3-phosphate and glycerol-1-phosphate dehydrogenases, were present.
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Affiliation(s)
- Milada Vítová
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Cell Cycles of Algae, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - Milena Stránská
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Analysis and Nutrition, Technická 3, 166 28 Prague, Czech Republic
| | - Andrea Palyzová
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Analysis and Nutrition, Technická 3, 166 28 Prague, Czech Republic
| | - Tomáš Řezanka
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic.
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Palyzová A, Cajthaml T, Řezanka T. Separation of regioisomers and enantiomers of triacylglycerols containing branched fatty acids (iso and/or anteiso). Electrophoresis 2021; 42:1832-1843. [DOI: 10.1002/elps.202000320] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 01/12/2023]
Affiliation(s)
- Andrea Palyzová
- Institute of Microbiology The Czech Academy of Sciences Prague 4 Czech Republic
| | - Tomáš Cajthaml
- Institute of Microbiology The Czech Academy of Sciences Prague 4 Czech Republic
- Institute for Environmental Studies Faculty of Science Charles University Prague 2 Czech Republic
| | - Tomáš Řezanka
- Institute of Microbiology The Czech Academy of Sciences Prague 4 Czech Republic
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Enantiomeric separation of triacylglycerols containing fatty acids with a ring (cyclofatty acids). J Chromatogr A 2020; 1622:461103. [DOI: 10.1016/j.chroma.2020.461103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 02/05/2020] [Accepted: 04/02/2020] [Indexed: 01/09/2023]
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Enantiomeric separation of triacylglycerols containing very long chain fatty acids. J Chromatogr A 2018; 1557:9-19. [DOI: 10.1016/j.chroma.2018.04.064] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 04/23/2018] [Accepted: 04/26/2018] [Indexed: 12/11/2022]
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Řezanka T, Lukavský J, Vítová M, Nedbalová L, Sigler K. Lipidomic analysis of Botryococcus (Trebouxiophyceae, Chlorophyta) - Identification of lipid classes containing very long chain fatty acids by offline two-dimensional LC-tandem MS. PHYTOCHEMISTRY 2018; 148:29-38. [PMID: 29366853 DOI: 10.1016/j.phytochem.2018.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 01/09/2018] [Accepted: 01/13/2018] [Indexed: 06/07/2023]
Abstract
Very long chain fatty acids (VLCFAs) were identified in four strains of the green alga Botryococcus braunii (Trebouxiophyceae). The algae contained a series of monoenoic fatty acids up to triacontenoic acid and further VLCFAs in amounts around 1% of total fatty acids. The separation of lipid classes using hydrophilic interaction chromatography revealed that the most abundant VLCFAs (28:2, 28:1 and 28:0) were contained in neutral lipids (triacylglycerols and/or diacylglycerols) and in phospholipids (phosphatidic acid and/or phosphatidylcholine). Using non-aqueous reversed-phase liquid chromatography tandem mass spectrometry (NARP-LC/MS2) of the appropriate collected fractions, molecular species of triacylglycerols containing one or two VLCFAs were described and phosphatidylcholines containing VLCFAs were separated for the first time. Because the presence of Botryosphaerella sudetica (Chlorophyceae) as contaminant of Botryococcus braunii strain Droop 1950/807-1 placed some doubts on the results of previous studies, a strain of this green alga of was also analyzed. In contrast to Botryococcus, C16, a substantially lower proportion of C18 polyunsaturated fatty acids and no VLCFAs were detected in Botryosphaerella.
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Affiliation(s)
- Tomáš Řezanka
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic.
| | - Jaromír Lukavský
- Institute of Botany of the Czech Academy of Sciences, Dukelská 135, 379 82, Třeboň, Czech Republic
| | - Milada Vítová
- Institute of Microbiology of the Czech Academy of Sciences, Laboratory of Cell Cycles of Algae, Centre Algatech, Opatovický mlýn, 379 81, Třeboň, Czech Republic
| | - Linda Nedbalová
- Charles University, Faculty of Science, Department of Ecology, Viničná 7, 128 44, Prague 2, Czech Republic
| | - Karel Sigler
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
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Řezanka T, Viden I, Nováková A, Bandouchová H, Sigler K. Wax Ester Analysis of Bats Suffering from White Nose Syndrome in Europe. Lipids 2015; 50:633-45. [PMID: 25975369 DOI: 10.1007/s11745-015-4027-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 04/28/2015] [Indexed: 12/22/2022]
Abstract
The composition of wax esters (WE) in the fur of adult greater mouse-eared bats (Myotis myotis), either healthy or suffering from white nose syndrome (WNS) caused by the psychrophilic fungus Pseudogymnoascus destructans, was investigated by high-resolution mass spectrometry analysis in the positive ion mode. Profiling of lipid classes showed that WE are the most abundant lipid class, followed by cholesterol esters, and other lipid classes, e.g., triacylglycerols and phospholipids. WE abundance in non-polar lipids was gender-related, being higher in males than in females; in individuals suffering from WNS, both male and female, it was higher than in healthy counterparts. WE were dominated by species containing 18:1 fatty acids. Fatty alcohols were fully saturated, dominated by species containing 24, 25, or 26 carbon atoms. Two WE species, 18:1/18:0 and 18:1/20:0, were more abundant in healthy bats than in infected ones.
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Affiliation(s)
- Tomáš Řezanka
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague 4, Czech Republic,
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Stránský K, Zarevúcka M, Valterová I, Wimmer Z. Gas chromatographic retention data of wax esters. J Chromatogr A 2006; 1128:208-19. [PMID: 16815429 DOI: 10.1016/j.chroma.2006.06.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2006] [Revised: 06/08/2006] [Accepted: 06/09/2006] [Indexed: 11/28/2022]
Abstract
Higher wax esters within the range of C24 to C44 (205 standards) were analyzed by means of gas chromatography and Kováts indexes (I) and reduced Kováts indexes (RKI) were calculated. The dependences of these retention data on number of carbon atoms and on number and position of double bonds in acid and in alcohol moieties of esters were plotted.
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Affiliation(s)
- Karel Stránský
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Department of Natural Products, Flemingovo nám. 2, CZ-166 10 Prague 6, Czech Republic
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Rezanka T, Votruba J. Chromatography of very long-chain fatty acids from animal and plant kingdoms. Anal Chim Acta 2002. [DOI: 10.1016/s0003-2670(02)00011-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Allard B, Templier J. High molecular weight lipids from the trilaminar outer wall (TLS)-containing microalgae Chlorella emersonii, Scenedesmus conmmunis and Tetraedron minimum. PHYTOCHEMISTRY 2001; 57:459-467. [PMID: 11393527 DOI: 10.1016/s0031-9422(01)00071-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
High molecular weight lipids were isolated from Chlorella emersonii, Scenedesmus communis and Tetraedron minimum, thin trilaminar outer wall (TLS)-containing freshwater microalgae producing an insoluble non-hydrolysable biopolymer (i.e. algaenan). Molecular weight determination by gel permeation chromatography indicated that their molecular weights range from ca. 400 to 2000 Da. Flash pyrolysis with in situ methylation using tetramethylammonium hydroxide (TMAH) and alkaline hydrolysis showed that the high molecular weight lipids isolated from C. emersonii and S. communis are mainly composed of saturated n-C26 and n-C28 fatty acids and alcohols and of saturated n-C30 and n-C32 alpha,omega-diols and omega-hydroxy acids. In contrast the high molecular weight lipids isolated from T. minimum are predominantly composed of long-chain fatty acids and omega-hydroxy acids. Aromatic moieties were also identified in small amounts in the thermochemolysate and in the hydrolysate. Chemical structural models containing long-chain mono- and polyesters were proposed for the high molecular weight lipids isolated from the three microalgae in agreement with analytical and spectroscopic data. Structural similarity between the outer cell wall of these microalgae and the cuticular membrane of higher plants is suggested.
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Affiliation(s)
- B Allard
- Laboratoire de Chimie Bioorganique et Organique Physique, UMR CNRS 7573, ENSCP, Paris, France.
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12
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Allard B, Templier J. Comparison of neutral lipid profile of various trilaminar outer cell wall (TLS)-containing microalgae with emphasis on algaenan occurrence. PHYTOCHEMISTRY 2000; 54:369-380. [PMID: 10897477 DOI: 10.1016/s0031-9422(00)00135-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The neutral lipid profiles of nine species of thin trilaminar outer wall (TLS)-containing freshwater and marine microalgae from the class of Chlorophyceae were studied with emphasis on the relationship between the lipid content and the occurrence of insoluble non-hydrolysable biopolymer (i.e. algaenan). All the freshwater microalgae produce a highly aliphatic algaenan. In sharp contrast, no algaenan was isolated from the two marine microalgae, Chlorella marina and Chlorella minutissima marina, supporting the absence of a close relationship between the presence of TLS and the occurrence of algaenan. High molecular weight straight-chain hydrocarbons (C23-C29) were identified in most of the algaenan-producing microalgae and in the algaenan-devoid C. minutissima marina, whereas only low molecular weight hydrocarbons were detected in algaenan-producing Scenedesmus subspicatus and in algaenan-devoid C. marina. Sterols, phytol and fatty alcohols were the major constituents of the polar fraction of the neutral lipids of all the microalgae investigated. High molecular weight saturated or mono-unsaturated alcohols were detected in C. emersonii and in all the microalgae belonging to the genus Scenedesmus. High amounts of saturated C30 and C32 alpha,omega-diols were also detected in S. subspicatus, S. armatus and S. pannonicus. Three classes of lipids were encountered in very small amounts in the medium polarity fraction of the neutral lipids of the microalgae investigated: (i) Monoesters composed predominantly of saturated C16 or C18 fatty acids and saturated C8, C16 or C18 alcohols and (ii) long-chain methyl ketones from C25 to C31 were detected in several species and (iii) methyl esters of fatty acids ranging from C16 to C28 were identified in all the microalgae. Attempts to use the neutral lipid composition and particularly the unusual long-chain lipids, as specific indicators of the occurrence of algaenan in TLS-containing microalgae were unsuccessful.
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Affiliation(s)
- B Allard
- Laboratoire de Chimie Bioorganique et Organique Physique, UMR CNRS 7573, E.N.S.C.P., Paris, France.
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Aichholz R, Lorbeer E. Investigation of combwax of honeybees with high-temperature gas chromatography and high-temperature gas chromatography-chemical ionization mass spectrometry. I. High-temperature gas chromatography. J Chromatogr A 1999; 855:601-15. [PMID: 10519097 DOI: 10.1016/s0021-9673(99)00725-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The combwaxes of the honeybee species Apis mellifera, Apis cerana, Apis dorsata, Apis laboriosa, Apis florea and Apis andreniformis have been examined by high-temperature gas chromatography. Combwax consists of a complex mixture of homologous neutral lipids. These compounds containing up to 64 carbons were chromatographed intact on a 10 m x 0.2 mm high-temperature stable SOP-50-PFD (50%-diphenyl/50%-1H,1H,2H,2H-perfluorodecylmethylpolysiloxane)-co ated Duran glass capillary column. The use of this stationary phase results in lower retention values and, at last, in lower thermal stress of the analytes. In order to minimize the discrimination effect due to adsorption and/or degradation, a two-step derivatization was performed resulting in the formation of tert.-butyldimethylsilyl esters of the long chain fatty acids and trimethylsilyl ethers of complex hydroxyesters, respectively. The derivatization procedure was optimized using a modification of the extended Donike test. In addition this test allows the quantification of the thermal stability of the derivatives performed. The derivatization procedure was applied for combwax analysis. More than 80 compounds were separated and their peak areas semiquantitatively exploited.
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Affiliation(s)
- R Aichholz
- Novartis Pharma AG, Research, Core Technology Area, Basel, Switzerland.
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Reiter B, Lechner M, Lorbeer E, Aichholz R. Isolation and Characterization of Wax Esters in Fennel and Caraway Seed Oils by SPE-GC. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1521-4168(19990901)22:9<514::aid-jhrc514>3.0.co;2-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Determination of plant triacylglycerols using capillary gas chromatography, high-performance liquid chromatography and mass spectrometry. J Chromatogr A 1991. [DOI: 10.1016/s0021-9673(01)88755-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Rezanka T, Mares P. Preparative separation of sphingolipids and of individual molecular species by high-performance liquid chromatography and their identification by gas chromatography-mass spectrometry. J Chromatogr A 1990; 509:333-46. [PMID: 2211899 DOI: 10.1016/s0021-9673(01)93091-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Six fractions containing tri- to pentaglycosylceramides were isolated from the green, fresh water alga Chlorella kessleri, grown heterotrophically, by using preparative high-performance liquid chromatography (HPLC). Up to twelve fractions were obtained by further reversed-phase HPLC of each glycosylceramide. The use of a polar capillary column with Supelcowax 10 as the stationary phase allowed an excellent separation of the individual molecular species of ceramides, even though the separation did not occur when the ceramides differed only in the position of the amide bond. The individual molecular species (even if present in mixtures) were identified by gas chromatography-chemical ionization mass spectrometry. The evidence for a complete structure was obtained by enzyme splitting with alpha- and beta-galactosidases (the sequence of monosaccharides) and by negative ionization fast atom bombardment mass spectrometry. More than 400 molecular species of glycosylceramides were identified.
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Affiliation(s)
- T Rezanka
- Institute of Microbiology, Czechoslovak Academy of Sciences, Prague
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Application of selective ion monitoring to the analysis of molecular species of vegetable oil triacylglycerols separated by open-tubular column GLC on a methylphenylsilicone phase at high temperature. Lipids 1989. [DOI: 10.1007/bf02535135] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Řezanka T, Podojil M. Preparative separation of algal polar lipids and of individual molecular species by high-performance liquid chromatography and their identification by gas chromatography—mass spectrometry. J Chromatogr A 1989. [DOI: 10.1016/s0021-9673(01)84492-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Affiliation(s)
- T Rezanka
- Department of Biogenesis, Institute of Microbiology, Czechoslovak Academy of Sciences, Prague
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Tvrzická E, Rezanka T, Krijt J, Janousek V. Identification of very-long-chain fatty acids in rat and mouse harderian gland lipids by capillary gas chromatography-mass spectrometry. JOURNAL OF CHROMATOGRAPHY 1988; 431:231-8. [PMID: 3243780 DOI: 10.1016/s0378-4347(00)83092-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Lipids of Harderian ophthalmic gland were separated by means of thin-layer chromatography with flame ionization detection in an latroscan apparatus. Wax ester and polar lipids (phosphatidylethanolamine and phosphatidylcholine) were detected as the main lipids in rats and glyceryl ether diester and both polar lipids were the main lipids in mice. Fatty acids were determined in individual lipid classes by means of gas chromatography and gas chromatography-mass spectrometry on capillary columns. The content of fatty acids, the positional isomers of monoenoic acids being predominantly C18, C20 and C22, is most interesting. Very-long-chain fatty acids, saturated fatty acids up to C30 and even monoenoic acids up to C28 were detected. Branched-chain fatty acids, predominantly iso and anteiso, are minority components, although their chain length distribution (C15-C27) is broad.
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Affiliation(s)
- E Tvrzická
- Lipid Laboratory, Faculty of Medicine, Charles University, Prague, Czechoslovakia
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Mares P. High temperature capillary gas liquid chromatography of triacylglycerols and other intact lipids. Prog Lipid Res 1988; 27:107-33. [PMID: 3060880 DOI: 10.1016/0163-7827(88)90007-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- P Mares
- Lipid Laboratory, Faculty of Medicine, Charles University, Prague, Czechoslovakia
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Affiliation(s)
- T Rezanka
- Institute of Microbiology, Czechoslovak Academy of Sciences, Prague
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