kinetically. With a large excess of biothiol, pseudo‐first‐order rate coefficients (kobsd) were found. Plots of kobsd versus [biothiolate] are linear, with a pH‐independent slope (kN). With the kinetic results obtained, the following conclusions can be drawn: (i) the reactivity increases in the sequence Cys‐Gly < Hcy < GSH < Cys; (ii) similar reactivity toward biothiols was found for ChC2 and ChC3, and
生物硫醇半胱
氨酸(Cys),
谷胱甘肽(GSH),高半胱
氨酸(Hcy)和半胱
氨酸甘
氨酸(Cys-Gly)与(E)-3-(3-(2-(2-
甲氧基苯基)
丙烯酰基)-7-甲氧基- 2 ħ -苯并
吡喃-2-酮和(ë)-3-(3-(3-
甲氧基苯基)
丙烯酰基)-7-甲氧基-2- ħ在
水溶液-色烯-2-酮(ChC2和ChC3,分别地)(25在室温下,用荧光法测定离子强度(0.2 M KCl),并进行动力学评估。大量
生物硫醇存在时,发现伪一阶速率系数(k obsd)。的曲线图ķ实测值与[biothiolate]是线性的,具有pH非依赖性的斜率(ķ Ñ)。根据获得的动力学结果,可以得出以下结论:(i)反应性按Cys-Gly