Cloning of two novel P-III class metalloproteinases from Trimeresurus stejnegeri venom gland

Hemorrhagic toxins are widely distributed in viperid and crotalid snake venoms. Envenomation of Trimeresurus stejnegeri, a member of Crotalidae family, caused potent systemic and local hemorrhage. Up to now, there is no report on hemorrhage toxins from th

中国穿山甲有丝分裂染色体和减数分裂联会复合体(SC)的研究

中国穿山甲的细胞遗传学分析表明, 染色体数目2n=40。除着丝粒C带外 还 有染色体端部C带和插入性C带。 两对小的端着丝粒染色体的随体部位有银染核 仁组织者(Ag-NORs)。对穿山甲核型的多态性以及减数分裂联会复合体的结构, 性染色体(X、Y)在减数分 裂前期的行为也进行了分析和讨论。图版2图1表3参15