Miyanishi T, Maita T, Morita F, Kondo S, Matsuda G
J Biochem. 1985 Feb;97(2):541-51. doi: 10.1093/oxfordjournals.jbchem.a135089.
Smooth muscle myosin from scallop (Patinopecten yessoensis) adductor muscle contains two kinds of regulatory light chains (regulatory light chains a and b), and myosin having regulatory light chain a is suggested to be suitable for inducing "catch contraction" rather than myosin having regulatory light chain b (Kondo, S. & Morita, F. (1981) J. Biochem. 90, 673-681). The amino acid sequences of these two light chains were determined and compared. Regulatory light chain a consists of 161 amino acid residues, while regulatory light chain b consist of 156 amino acid residues. Amino acid substitutions and insertions were found only in the N-terminal regions of the sequences. The structural difference between the two light chains may contribute to the functional difference between myosins having regulatory light chains a and b.
扇贝（虾夷扇贝）闭壳肌中的平滑肌肌球蛋白含有两种调节轻链（调节轻链a和b），并且有人认为含有调节轻链a的肌球蛋白比含有调节轻链b的肌球蛋白更适合诱导“强直收缩”（近藤，S.和森田，F.（1981年）《生物化学杂志》90，673 - 681）。测定并比较了这两种轻链的氨基酸序列。调节轻链a由161个氨基酸残基组成，而调节轻链b由156个氨基酸残基组成。仅在序列的N端区域发现了氨基酸替换和插入。这两种轻链之间的结构差异可能导致含有调节轻链a和b的肌球蛋白之间的功能差异。
