Cross bridge(横桥)特性： 1 Actin binding site forms cross bridge 2 Nucleotide binding site binds ATP (Myosin ATPase) A.M.D.P. A.M. ADP+R M.D.P. M.T.Cross bridge(横桥)特性： 1 Actin binding site forms cross bridge 2 Nucleotide binding site binds ATP (Myosin ATPase)