The commonest protein in muscle cells, responsible for the elastic and contractile properties of muscle. It combines with actin to form actomyosin.

• 肌球蛋白在肌肉细胞中最普通的蛋白质,对肌肉的弹性和收缩性的特性很重要,它与肌动朊结合形成肌动球朊。