生物化学谢邀。 首先要说一下，α螺旋（α helix）中氢键形成是隔4个氨基酸。这里参考Lehininger principles of biochemistry seventh edition中所陈述的内容。 The structure is stabilized by a hydrogen bond between the hydrogen atom attached to the electronegative nitrogen atom of a peptide linkage and the electronegative carbonyl oxygen atom of the fourth amino ...
The η symbol indicates a 310-helix. α-helices, 310-helices and π-helices are shown as medium, small and large squiggles, respectively. β-strands are shown as arrows, strict β-turns as letters TT and strict α-turns as TTT.
