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MARKS MH, BEAR RS, BLAKE CH. X-ray diffraction evidence of collagen-type protein fibers in the Echinodermata, Coelenterata and Porifera. ACTA ACUST UNITED AC 2007; 111:55-78. [PMID: 18151961 DOI: 10.1002/jez.1401110104] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Caurie M. The unimolecular character of the classical Brunauer, Emmett and Teller adsorption equation and moisture adsorption. Int J Food Sci Technol 2005. [DOI: 10.1111/j.1365-2621.2004.00892.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Any theory as to the structure of the molecule of simple native protein must take account of a number of facts belonging to many different domains of science. As our starting point we take the following: (
а
) The molecules are largely, if not entirely, made up of amino- and imino-acid molecules. They contain peptide linkages, but in general few —NH
2
groups not belonging to side chains, and, in some cases, possibly none (Cohn 1928). (
b
) There is a general uniformity among proteins of widely different chemical composition (Jordan Lloyd 1926; Astbury and Lomax 1935); presumably, therefore, there is a simple general plan in the arrangement of the amino- and imino-acid residues characteristic of proteins in general.
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Inverse Gas Chromatographic Study of Moisture Sorption by Wheat and Soy Flour and the Effect of Specific Heat Treatment on Their Sorption Behavior. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/b978-0-444-88834-1.50027-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Water at Surfaces. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/b978-0-12-571812-7.50009-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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FRAENKEL G, RUDALL KM. The structure of insect cuticles. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON. SERIES B, BIOLOGICAL SCIENCES 1947; 134:111-43. [PMID: 20281596 DOI: 10.1098/rspb.1947.0006] [Citation(s) in RCA: 64] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
The amount of chitin and of protein in the blowfly larval cuticle remains essentially unchanged during the process of hardening and darkening of the puparium. In the formation of the puparium there is a gain of weight of about 6 % over the larval cuticle weight, and this can be accounted for by the incorporation of phenolic substances. These are derived from the free tyrosine in the blood which decreases by an amount sufficient to account for the weight increase of the cuticle. An insoluble and highly resistant fraction has been isolated from the puparium, and this consists of about equal quantities of protein and pigment and possibly represents the natural association of these two substances in parts of the puparium. All the evidence suggests that the tyrosine is deaminated before giving the derivatives which combine with the cuticle substance, hardening and darkening it. Further properties of arthropodin, the water-soluble protein of soft arthropodal cuticles, are described. X-ray and related studies give a picture of the polysaccharide/protein complex in the cuticle which implies a model with alternating monolayers of protein and chitin. This appears to be based on a ratio of 3 amino acid residues to 1 chitobiose residue, or for equal lengths of protein and chitin chains a weight ratio of 45:55. This basic weight-ratio of protein and chitin appears to occur in the soft cuticles of blowfly larvae and other arthropods. A review is given of the composition and properties of various cuticles, and it is evident that hardening may be achieved without darkening of the cuticle. The chemical basis of this type of cuticle stabilization merits further study.
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ALEXANDROV WJ, NASSONOV DN. UBER DIE URSACHEN DER KOLLOIDALEN VERÄNDERUNGEN DES PROTOPLASMAS. ACTA ZOOL-STOCKHOLM 1943. [DOI: 10.1111/j.1463-6395.1943.tb00015.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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