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首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >Isentropic and isothermal compressibilities of the backbone glycyl group of proteins in aqueous solution.
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Isentropic and isothermal compressibilities of the backbone glycyl group of proteins in aqueous solution.

机译:水溶液中蛋白质主链糖基的等熵和等温可压缩性。

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摘要

The partial molar isentropic compressibilities at infinite dilution, K(S,2)(o), have been determined for the peptides serylglycine, serylglycylglycine and serylglycylglycylglycine in aqueous solution at 25 degrees C. The partial molar volumes at infinite dilution, V(2)(o), have also been determined for these peptides in aqueous solution at the temperatures 15, 30 and 40 degrees C. These results, along with those obtained previously at 25 degrees C, were used to derive the partial molar exansibilities, E(2)(o), of the peptides at 25 degrees C, which in turn were used to convert the isentropic compressibilities into the partial molar isothermal compressibilities at infinite dilution, K(T,2)(o). These K(S,2)(o) and K(T,2)(o) results were used to obtain the partial molar compressibilities of the glycyl group CH(2)CONH at 25 degrees C. The results are compared with those obtained using data for other series of peptides of sequence ala(gly)(n), n=1-4, and (gly)(n), n=2-5.
机译:已经确定了25°C水溶液中肽的丝氨酸甘氨酸,丝氨酰甘氨酰甘氨酸和丝氨酰甘氨酰甘氨酰甘氨酸在无限稀释下的部分摩尔等熵可压缩性K(S,2)(o)。无限稀释下的部分摩尔体积V(2) (o),还已经在15、30和40摄氏度的温度下确定了这些肽在水溶液中的含量。这些结果与先前在25摄氏度下获得的结果一起用于推导部分摩尔渗透率E(2 )(o)在25摄氏度时的肽,这些肽又被用于将等熵可压缩性转化为无限稀释时的部分摩尔等温可压缩性K(T,2)(o)。将这些K(S,2)(o)和K(T,2)(o)结果用于获得25°C下的缩水甘油基CH(2)CONH的部分摩尔压缩率。将结果与所得结果进行比较使用序列ala(gly)(n),n = 1-4和(gly)(n),n = 2-5的其他系列肽的数据。

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