Hinton J F, Fernandez J Q, Shungu D C, Whaley W L, Koeppe R E, Millett F S
Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville 72701.
Biophys J. 1988 Sep;54(3):527-33. doi: 10.1016/S0006-3495(88)82985-0.
Thermodynamic parameters for the binding of the monovalent cations, Li+, Na+, K+, Rb+, Cs+, NH4+, TI+, and Ag+, to gramicidin A and for the binding of TI+ to gramicidin C, incorporated into lysophosphatidylcholine, have been determined using a combination of TI-205 nuclear magnetic resonance spectroscopy and competition binding. The thermodynamic parameters, enthalpy and entropy, are discussed in terms of a process involving the transfer of cations from an aqueous to amide environment.
已使用铊 - 205核磁共振光谱法和竞争结合法相结合的方法,测定了单价阳离子Li⁺、Na⁺、K⁺、Rb⁺、Cs⁺、NH₄⁺、Tl⁺和Ag⁺与短杆菌肽A的结合以及Tl⁺与掺入溶血磷脂酰胆碱中的短杆菌肽C的结合的热力学参数。从涉及阳离子从水性环境转移到酰胺环境的过程方面,讨论了焓和熵等热力学参数。