101
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Gupta AK, Dufour C, Marchal E. Structure of aggregates and helix-coil transition of polypeptides by dielectric measurements. I. Poly-gamma-benzyl-L-glutamate in dioxane and dioxane-dichloroacetic acid. Biopolymers 1974; 13:1293-308. [PMID: 4415916 DOI: 10.1002/bip.1974.360130702] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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102
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Yamamoto H, Yang JT. Syntheses and conformational studies of poly(N-epsilon-methyl-L-lysine), poly(N-delta-methyl-L-ornithine), poly(N-delta-ethyl-L-ornithine), and their carbobenzoxy derivatives. Biopolymers 1974; 13:1093-107. [PMID: 4854563 DOI: 10.1002/bip.1974.360130603] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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103
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Dowling LM, Crewther WG. Isolation of components from the low-sulphur proteins of wool by fractional precipitation. PREPARATIVE BIOCHEMISTRY 1974; 4:203-26. [PMID: 4479361 DOI: 10.1080/00327487408068199] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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104
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Le Barny P, Loucheux-Lefebvre MH. Study by circular dichroism and optical rotatory dispersion of polypeptides with aromatic side-chain chromophores. Biopolymers 1973; 12:2831-52. [PMID: 4782557 DOI: 10.1002/bip.1973.360121215] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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105
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Hamuro J, Chihara G. Effect of antitumour polysaccharides on the higher structure of serum protein. Nature 1973; 245:40-1. [PMID: 4583127 DOI: 10.1038/245040a0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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106
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Maeda H, Inoue T, Tsunoda MA, Ikeda S. Conformation of Poly( S-benzyl-L-cysteine) in Solution. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1973. [DOI: 10.1246/bcsj.46.2708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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107
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Matsumoto M, Watanabe H, Yoshioka K. Electric and hydrodynamic properties of polypeptides in solution. IV. A new conformational change of poly(L-glutamic acid) in dimethylsulfoxide-methanol mixtures. Biopolymers 1973; 12:1729-39. [PMID: 4733705 DOI: 10.1002/bip.1973.360120803] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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108
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Matsuoka M, Norisuye T, Teramoto A, Fujita H. Solution properties of synthetic polypeptides. XV. Helix-coil transition in poly(epsilon-carbobenzyloxy L-lysine). Biopolymers 1973; 12:1515-32. [PMID: 4741156 DOI: 10.1002/bip.1973.360120707] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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109
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110
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111
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112
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113
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Some aspects of the spectropolarimetric investigation of the histone component of DNP. Bull Exp Biol Med 1973. [DOI: 10.1007/bf00803121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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114
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v Muiswinkel-Voetberg H, Veeger C. Conformational studies on lipoamide dehydrogenase from pig heart. 2. Spectroscopic studies on the apoenzyme and the monomeric and dimeric forms. EUROPEAN JOURNAL OF BIOCHEMISTRY 1973; 33:271-8. [PMID: 4348440 DOI: 10.1111/j.1432-1033.1973.tb02680.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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115
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116
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Martin AR. Spectroscopic methods in biology, with application to neurophysiology. ADVANCES IN BIOLOGICAL AND MEDICAL PHYSICS 1973; 14:225-84. [PMID: 4353469 DOI: 10.1016/b978-0-12-005214-1.50009-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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117
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Walton AG, Blackwell J. ELECTRONIC SPECTROSCOPY. Biopolymers 1973. [DOI: 10.1016/b978-0-12-734350-1.50010-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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118
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Yaron A, Tal N, Berger A. Synthesis and conformation of poly(L-lysyl-L-alanyl-L-alanyl), a sequence-ordered water-soluble copolymer. Biopolymers 1972; 11:2461-81. [PMID: 4649728 DOI: 10.1002/bip.1972.360111207] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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120
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121
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Abstract
1. The denaturation of ovalbumin by the reagents sodium dodecyl sulphate and guanidinium chloride was investigated, by following the changes in sedimentation velocity, optical rotatory dispersion and viscosity as a function of denaturant concentration. 2. With sodium dodecyl sulphate both the optical-rotatory-dispersion parameters a(0) and b(0) become more negative, the sedimentation coefficient decreases and the viscosity increases; significant differences in the denaturation profiles are observed. The change in each parameter is indicative of only limited denaturation. 3. With guanidinium chloride the transition occurs over the concentration range 1-4m: more extensive changes occur in all the physical parameters than with sodium dodecyl sulphate. The values of a(0) and b(0) are indicative of complete denaturation. Reduction by mercaptoethanol produces only minor further changes. 4. Renaturation was attempted from both denaturants, the removal of reagent being accomplished reversibly by controlled slow dialysis. Partial renaturation was observed, but aggregated or insoluble material was produced in both cases at relatively low concentrations of denaturant. Similar behaviour was observed with fully reduced protein in guanidinium chloride-mercaptoethanol; complete renaturation could not be brought about even at very low protein concentrations.
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122
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Dubin P, Karasz FE. The absence of an isotope effect on the stability of the poly- -benzyl-L-aspartate -helix in aprotic solvents. Biopolymers 1972; 11:1745-63. [PMID: 5056091 DOI: 10.1002/bip.1972.360110818] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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123
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Nagradova NK, Guseva MK. Structural changes accompanying the reversible cold inactivation of glyceraldehyde-3-phosphate dehydrogenase from rat skeletal muscle. EXPERIENTIA 1972; 28:632-3. [PMID: 5045151 DOI: 10.1007/bf01944943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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124
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125
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Baghurst PA, Nichol LW, Sawyer WH. The Effect of D2O on the Association of β-Lactoglobulin A. J Biol Chem 1972. [DOI: 10.1016/s0021-9258(19)45232-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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126
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Bradbury EM, Cary PD, Crane-Robinson C, Riches PL, Johns EW. Nuclear-magnetic resonance and optical-spectroscopic studies of conformation and interactions in the cleaved halves of histone F2B. EUROPEAN JOURNAL OF BIOCHEMISTRY 1972; 26:482-9. [PMID: 5025928 DOI: 10.1111/j.1432-1033.1972.tb01790.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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127
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Jones JM, Creeth JM, Kekwick RA. Thio reduction of human 2 -macroglobulin. The subunit structure. Biochem J 1972; 127:187-97. [PMID: 5073741 PMCID: PMC1178573 DOI: 10.1042/bj1270187] [Citation(s) in RCA: 134] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
1. Human alpha(2)-macroglobulin was prepared from a fraction obtained during the large-scale separation of normal human plasma proteins for clinical use. 2. Sedimentation-equilibrium measurements indicated a molecular weight of 725000. A value of 18.1S was obtained for s(0) (20,w). 3. The dissociation that occurs in the pH range 4.5-2.5 and in the region of neutrality in urea-containing solutions is consistent with a dimeric structure of the molecule. 4. The effects of the thiol reagents mercaptoethanol, mercaptoethylamine and N-acetylcysteine were investigated over a range of experimental conditions. Distinct components having sedimentation coefficients of 15, 12 and 8.5S were identified. 5. Conditions were found under which limited reduction with thiol liberated a subunit with a molecular weight approximately one-quarter of that of the intact molecule. This subunit retains the serological specificity of the whole molecule.
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128
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Giacometi G, Turolla A, Verdini AS. Enthalpy of helix-coil transition from heat of solutions. 3. Poly-N- -carbobenzoxy-L-ornithine and poly-N- -carbobenzoxy-L- , -aminobutyric acid. Biopolymers 1972; 11:215-24. [PMID: 5008181 DOI: 10.1002/bip.1972.360110116] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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129
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Cammack KA, Marlborough DI, Miller DS. Physical properties and subunit structure of L-asparaginase isolated from Erwinia carotovora. Biochem J 1972; 126:361-79. [PMID: 4561025 PMCID: PMC1178385 DOI: 10.1042/bj1260361] [Citation(s) in RCA: 68] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
1. l-Asparaginases from Erwinia carotovora and Escherichia coli (EC2 enzyme) are both capable of inhibiting and eliminating certain types of tumour cells. The Er. carotovora enzyme is a more basic protein, however, and in contrast with the EC2 enzyme it contains neither tryptophan nor cystine, and disulphide bonds are therefore absent. The molecule is very stable in solution from pH3.0 to about pH12.0, and is somewhat more stable at alkaline pH than is the Esch. coli enzyme. Calculations based on a s(0) (20,w) 7.43S and a sedimentation-equilibrium molecular weight of 135000+/-10000 give a frictional ratio (f/f(0)) of 1.08. The molecular conformation is therefore very compact in solution, and the electron microscope shows the negatively stained molecules as almost spherical particles with a diameter of 7.2+/-0.7nm. 2. Sedimentation-velocity and equilibrium ultracentrifugation, in 5-8m solutions of urea and guanidinium chloride, and also electrophoresis in sodium dodecyl sulphate-polyacrylamide gel, reveal a dissociation of the native protein molecule into four subunits of similar molecular weight in the range 32500-38000. The enzymically inactive subunits can be physically reassembled into an active tetramer when urea is removed by dialysis. Although the subunit structures of the Er. carotovora enzyme and the Esch. coli enzyme molecules are similar, the secondary bonding forces holding the subunits together in the tetramer are somewhat stronger in the Er. carotovora enzyme. 3. The optical-rotatory-dispersion (o.r.d.) parameters that characterize the Cotton effects arising from ordered structure in the molecule are [m'](233)=-3522+/-74 degrees and [m'](200)=9096+/-1700 degrees . These show very marked changes as the secondary structure is disrupted and the molecule dissociates into subunits. A correlation pathway was traced on the basis of o.r.d. parameters and enzyme activity as the polypeptide chains were denatured and renatured (and reconstituted) into active molecules after the dilution of solutions in urea. Subunits resulting from treatment with sodium dodecyl sulphate do not show the typically disordered o.r.d. profile, but nevertheless they are inactive.
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130
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Mukherjee S, Sarko A, Marchessault RH. Far-ultraviolet optical activity of saccharide derivatives. II. Dextran, amylose, and mycodextran acetes; dextran and amylose xanthates. Biopolymers 1972. [DOI: 10.1002/bip.1972.360110123] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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131
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Hayakawa T, Yamamoto H, Aoto N. Syntheses and conformational studies of poly- ,N-alkyl L-asparagines. Biopolymers 1972; 11:185-96. [PMID: 5008179 DOI: 10.1002/bip.1972.360110114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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132
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Kochwa S, Terry WD, Capra JD, Yang NL. Structural studies of immunoglobulin E. I. Physicochemical studies of the IgE molecule. Ann N Y Acad Sci 1971; 190:49-70. [PMID: 5290027 DOI: 10.1111/j.1749-6632.1971.tb13523.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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133
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Rogers S. Change in the structure of Shope papilloma virus-induced arginase associated with mutation of the virus. J Exp Med 1971; 134:1442-52. [PMID: 4331301 PMCID: PMC2139101 DOI: 10.1084/jem.134.6.1442] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The change in the state of the virus-induced enzyme associated with a mutation in the virus provides additional evidence that the enzyme is synthesized from virus rather than rabbit genetic information. This change in structure results in differences in stability of polymerization, degree of optical rotary dispersion (ORD) specific rotation, change in elution characteristics from carboxymethyl cellulose, and a reduction in specific activity of the arginase. Liver arginase differs markedly in ORD characteristics from the virus-induced enzyme. In contrast to the virus-induced enzyme, it showed no negative Cotton effect at 233 nm until it was activated with manganese. Manganese had no influence on the ORD spectrum of virus-induced arginase. In addition, liver arginase is denatured by 4 M urea, while the virus-induced enzyme requires 10 M urea for denaturation.
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134
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135
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Effect of mustine and sarcolysin on the structural of total histone. Bull Exp Biol Med 1971. [DOI: 10.1007/bf00792844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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136
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137
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Zand R, Agrawal BB, Goldstein IJ. pH-dependent conformational changes of concanavalin A. Proc Natl Acad Sci U S A 1971; 68:2173-6. [PMID: 5289376 PMCID: PMC389378 DOI: 10.1073/pnas.68.9.2173] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The pH dependence of the conformation of concanavalin A has been studied by means of optical rotatory dispersion and circular dichroism spectroscopy. At pH 2.9, 5.0, and 7.0, the major contribution to organized structure appears to be the beta conformation. At pH 9.1, the conformation of concanavalin A approaches the random coil or unordered form. No evidence could be found for the presence of any significant amount of alpha helix. The pH of maximum precipitin-like activity of concanavalin A is paralleled by the pH dependence of the parameter b(0) in the Moffitt equation.
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138
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Oriel PJ, Lindsey P, Schueneman C. Conformational changes in the reassembly of MS2 protein subunits. Biopolymers 1971; 10:1661-72. [PMID: 5126132 DOI: 10.1002/bip.360100919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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139
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Parrish JR, Blout ER. Spectroscopic studies of random chain and -helical polypeptides in hexafluoroisopropanol. Biopolymers 1971; 10:1491-512. [PMID: 5126122 DOI: 10.1002/bip.360100906] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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140
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Yaron A, Katchalski E, Berger A, Fasman GD, Sober HA. The chain length dependence of the conformation for oligomers of L-lysine in aqueous solution: optical rotatory dispersion studies. Biopolymers 1971; 10:1107-20. [PMID: 5095086 DOI: 10.1002/bip.360100703] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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141
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Location of aromatic amino acids and belix content in Escherichia coli ribonucleic acid polymerase. Biochem J 1971; 123:117-22. [PMID: 4942833 PMCID: PMC1176905 DOI: 10.1042/bj1230117] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
1. The perturbing effect of glycerol on the direct spectrum of Escherichia coli DNA-dependent RNA polymerase has been studied. 2. By comparison with model compounds and with the unfolded polymerase in 3.8m-urea it was possible to determine the ratio of tyrosine and tryptophan residues present. On reduction of the urea-treated enzyme with 2-mercaptoethanol, no further change in the difference spectrum occurred. 3. The amino acid composition of the enzyme is given. 4. In the intact protein approx. 30% of the tryptophan and 54% of the tyrosine residues were exposed. In conjunction with the extinction value and molecular weight this corresponded to 7 tryptophan residues and 57 tyrosine residues on the surface and 16 tryptophan residues and 48 tyrosine residues ;buried'. 5. The optical rotatory dispersion of the enzyme was unaffected by 20% glycerol. 6. The helix content calculated from Moffit plots over 560-300nm was 13%, and from the 233nm trough 13%.
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142
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Chirgadze YN, Venyaminov SY, Lobachev VM. Optical rotatory dispersion of polypeptides in the near-infrared region. Biopolymers 1971; 10:809-20. [PMID: 5572627 DOI: 10.1002/bip.360100505] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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143
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144
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Chou PY, Scheraga HA. Calorimetric measurement of enthalpy change in the isothermal helix--coil transition of poly-L-lysine in aqueous solution. Biopolymers 1971; 10:657-80. [PMID: 5552138 DOI: 10.1002/bip.360100406] [Citation(s) in RCA: 92] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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145
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Gaskin F, Yang JT. Helix-coil transition of poly-gamma-N-carbobenzoxy-L-alpha, gamma-diaminobutyrate and poly-delta-N-carbobenzoxy-L-ornithine. Biopolymers 1971; 10:631-45. [PMID: 5552136 DOI: 10.1002/bip.360100404] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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146
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Freedberg WB, Hardman JK. Structural and Functional Roles of the Cysteine Residues in the α Subunit of the Escherichia coli Tryptophan Synthetase. J Biol Chem 1971. [DOI: 10.1016/s0021-9258(19)76992-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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147
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Puett D, Ciferri A. Conformational studies on concentrated solutions of poly(gamma-benzyl L-glutamate). Biopolymers 1971; 10:547-64. [PMID: 5552660 DOI: 10.1002/bip.360100310] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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148
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Josse J, Wong SC. 20 Inorganic Pyrophosphatase of Escherichia coli. ACTA ACUST UNITED AC 1971. [DOI: 10.1016/s1874-6047(08)60380-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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149
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150
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FUNATSU M, FUNATSU G, ISHIGURO M, HARA K. Structure and Toxic Function of Ricin III. ACTA ACUST UNITED AC 1971. [DOI: 10.2183/pjab1945.47.786] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masaru FUNATSU
- Laboratory of Biochemistry, Faculty of Agriculture, Kyushu University
| | - Gunki FUNATSU
- Laboratory of Biochemistry, Faculty of Agriculture, Kyushu University
| | | | - Kenji HARA
- Laboratory of Biochemistry, Faculty of Agriculture, Kyushu University
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