Volumetric properties of tripeptides with non-polar side-chains: Partial molar volumes at T = (288.15 to 313.15) K and partial molar expansions at T=298.15 K of some peptides of sequence gly-X-gly in aqueous solution

被引：8

作者：

Liu, Jin L. ^{[2
]}

Hakin, Andrew W. ^{[2
]}

Hedwig, Gavin R. ^{[1
]}

机构：

[1] Massey Univ, Inst Fundamental Sci Chem, Palmerston North, New Zealand

[2] Univ Lethbridge, Dept Chem & Biochem, Lethbridge, AB T1K 3M4, Canada

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2009年 / 41卷 / 11期

关键词：

Density; Partial molar volume; Partial molar expansion; Tripeptides; Aqueous solution; Group additivity; AMINO-ACID AMIDES; HEAT-CAPACITIES; THERMODYNAMIC PROPERTIES; MODEL COMPOUNDS; PROTEINS; COMPRESSIBILITIES; EXPANSIBILITIES; 25-DEGREES-C; DERIVATIVES; APPARENT;

D O I：

10.1016/j.jct.2009.05.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Solution densities have been determined for aqueous solutions of the tripeptides of sequence glycyl-X-glycine, where X is one of the amino acids alanine, valine, leucine, isoleucine, phenylalanine, methionine, and proline, at T = (288.15, 303.15, and 313.15) K. These solution densities were used to calculate the partial molar volumes at infinite dilution, V-2 degrees, for the tripeptides. The V-2 degrees results were combined with those determined in previous work for T = 298.15 K to obtain the partial molar isobaric expansions at infinite dilution, E-2 degrees{E-2 degrees = (partial derivative V-2 degrees/partial derivative T)(p)}, forthe tripeptides at T = 298.15 K. The contribution of amino acid side-chain hydration to the E-2 degrees results has been discussed. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1232 / 1238

页数：7

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