物理化学学报 >> 1989, Vol. 5 >> Issue (05): 583-586.doi: 10.3866/PKU.WHXB19890514

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量热滴定法测定苯丙氨酸、亮氨酸、蛋氨酸、色氨酸的热力学函数

杨桦; 王文清; 彭立娥   

  1. 北京大学技术物理系
  • 收稿日期:1988-01-30 修回日期:1988-07-08 发布日期:1989-10-15
  • 通讯作者: 王文清

THE DETERMINATION OF THERMODYNAMIC FUNCTION OF PROTONATION OF PHENYLALANINE, LEUCINE, TRYPTOPHAN AND METHIONINE BY TITRATION CALORIMETRY

Yang Hua; Wang Wenqing*; Peng Lie   

  1. Department of Technical Physics; Peking University
  • Received:1988-01-30 Revised:1988-07-08 Published:1989-10-15
  • Contact: Wang Wenqing

Abstract: The thermodynamic functions of protonation reactions of phenylalanine, leucine, tryptophan and methionine have been determined by titration calorimetry combined with computer fit program for thermodynamic function and it has been reported that there are differences between ΔH, logβ, ΔG and ΔS of protonation reactions of amino acids. From the experimental results, the differences are related to the nature of the side chain substituent group R of asymmetric carbon atom of α-amino acid and the sequence of the differences has also been reported.