THERMODYNAMIC PROPERTIES OF PEPTIDE SOLUTIONS .11. PARTIAL MOLAR ISENTROPIC PRESSURE COEFFICIENTS IN AQUEOUS-SOLUTIONS OF SOME TRIPEPTIDES THAT MODEL PROTEIN SIDE-CHAINS

被引：42

作者：

HEDWIG, GR ^{[1
]}

HOILAND, H ^{[1
]}

机构：

[1] UNIV BERGEN,DEPT CHEM,N-5007 BERGEN,NORWAY

来源：

BIOPHYSICAL CHEMISTRY | 1994年 / 49卷 / 02期

关键词：

PARTIAL MOLAR ISENTROPIC PRESSURE COEFFICIENT; SPEED OF SOUND; TRIPEPTIDE; AQUEOUS SOLUTION; SIDE-CHAIN SOLVATION;

D O I：

10.1016/0301-4622(93)E0068-G

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The partial molar isentropic pressure coefficients at infinite dilution K-s,2(infinity) (K-s,2(infinity) = -(partial derivative V-2(infinity)/partial derivative p)(s), where V-2(infinity) is the partial molar volume at infinite dilution) have been determined for nine tripeptides in aqueous solution at 25 degrees C. The tripeptides are all of sequence glycyl-X-glycine, where X is an amino acid. These K-s,2(infinity) results, in conjunction with those for glycylglycylglycine, were used to estimate the amino acid side-chain contributions to K-s,2(infinity) Of peptides. These side-chain contributions are critically compared with previous estimates based on K-s,2(infinity) data for the amino acids. The variation in the side-chain contributions derived using the peptide K-s,2(infinity) results has been rationalized in terms of likely peptide-solvent interactions.

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页码：175 / 181

页数：7

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