METHODS Streptococcus equin was treated with NTG,and cultured with adding L-glycerin-3-calcium phosphate and lysozyme to control cell wall infiltrates and cell membrane infiltrates,respectivelly.

• 方法经诱变马疫链球菌,选育甘油缺陷型菌株,添加甘油调节细胞膜的通透性,添加溶菌酶调控细胞壁的通透性。