通过氘-氢溶剂差异中子衍射确定相位的短杆菌肽A的5-A傅里叶图。
5-A Fourier map of gramicidin A phased by deuterium-hydrogen solvent difference neutron diffraction.
作者信息
Koeppe R E, Schoenborn B P
出版信息
Biophys J. 1984 Mar;45(3):503-7. doi: 10.1016/S0006-3495(84)84186-7.
Abstract
Crystals of ion-free gramicidin A (P212121: a = 24.61, b = 32.28, c = 32.52) have been investigated using neutron diffraction. A difference analysis of crystals soaked in ethanol/H2O as opposed to ethanol-d6/D2O has led to single isomorphous replacement Fourier projections of the structure at 5-A resolution. The gramicidin dimer appears to be a 32-A-long cylinder oriented parallel to the c-axis in these crystals.
摘要
已使用中子衍射研究了无离子短杆菌肽A（P212121：a = 24.61，b = 32.28，c = 32.52）的晶体。对浸泡在乙醇/H₂O与乙醇-d₆/D₂O中的晶体进行差异分析，得到了该结构在5埃分辨率下的单同晶置换傅里叶投影。在这些晶体中，短杆菌肽二聚体似乎是一个平行于c轴取向的32埃长的圆柱体。
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