聚[d(G-C)]在水-乙醇溶液中B-Z转变的热力学。“连接量热法”
Thermodynamics of B-Z transition of poly[d(G-C)] in a water-ethanol solution. The "tie calorimetry".
作者信息
Karapetyan A T, Minyat E E, Vardevanyan P O, Ivanov V I
机构信息
Kirovakan Teachers Training Institute, Armenian SSR, USSR.
出版信息
J Biomol Struct Dyn. 1989 Jun;6(6):1233-8. doi: 10.1080/07391102.1989.10506547.
Abstract
Poly[d(G-C)] in a 55% ethanol solution undergoes a transition from the Z form to the B form when the temperature is increased from 20 degrees to 50 degrees C. The enthalpy of the transition, delta HBA = -1.4 kcal/mol, has been determined with a "tie" polyamine which stabilizes the Z conformation. This value has been shown to be practically independent of ionic strength within the range of 5 X 10(-4) M - 2 X 10(-3) M NaCl.
摘要
在55%乙醇溶液中的聚[d(G-C)]，当温度从20℃升高到50℃时，会从Z型转变为B型。已经用一种稳定Z构象的“连接”多胺测定了转变焓，ΔHBA = -1.4千卡/摩尔。该值已被证明在5×10⁻⁴M - 2×10⁻³M NaCl范围内实际上与离子强度无关。
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