The electronic density of the N line became less intensive, and the I-band increased in breadth following gossypol treatment, it suggested that gossypol might induce muscle relaxation and thus inhibit contraction. 服棉酚后N线的电子密度较对照组为低,同时Ⅰ带的宽度相应加大,提示棉酚有加深心肌纤维松弛状态的可能性。