Thermodynamic properties of peptide solutions. Part 6.—The amino acid side-chain contributions to the partial molar volumes and heat capacities of some tripeptides in aqueous solution
作者:Julia F. Reading、Gavin R. Hedwig
DOI:10.1039/ft9908603117
日期:——
molar volumes, V02, and partial molar heat capacities, C0p, 2, have been determined for the tripeptides glycyl-L-valylglycine, glycyl-DL-serylglycine and the D and L isomers of glycylleucylglycine in aqueous solution at 298.15 K. These V02 and C0p, 2 results, in conjunction with those for glycylglycylglycine, were used to estimate the contribution of the side chains to the thermodynamic properties. The
已经确定了三肽甘油基-L-戊基甘氨酸,甘油基-DL-丝氨基甘氨酸以及水溶液中glycylleucylglycine的D和L异构体的极限偏摩尔体积V 0 2和偏摩尔热容C 0 p,2 298.15K。将这些V 0 2和C 0 p,2结果与甘氨酰甘氨酰甘氨酸的结果一起用于估算侧链对热力学性质的贡献。将获得的结果与使用V 0估计的结果进行比较2和C 0 p,2个氨基酸和二肽数据。比较表明,序列甘氨酰-X-甘氨酸的三肽是合理的模型,用于估计溶剂可及的侧链对蛋白质的热力学性质的贡献。