myoglobulin

Actin and myoglobulin are the compositions building muscles' stretching function. Microtubulin is the basic substance which provides the flagellum and cilium the function of movement.

肌蛋白及肌球蛋白乃是构肌肉伸缩机构分，微管蛋白是予鞭毛及纤毛基本物质。