Like light meromyosin, tropomyosin contains two peptide chains in a coiled coil conformation.

象轻酶解肌球蛋白一样，原肌球蛋白含有两个肽链，其构型为盘旋螺旋。

A helical conformation of a polypeptide chain, usually right-handed, with maximal intrachain hydrogen bonding; one of the most common secondary structures in proteins.

折叠是由若干肽段或肽链排列起来所形展片层构象。

Cistron A unit of function, i.e. a segment of DNA that determines a single polypeptide chain of a protein molecule or a messenger RNA molecule.

是一个功能上结构，它是决定蛋白质分子一条简单多肽链或信使RNA分子DNA片断。