[名词解释] surface receptor superfamilies (表面受体超家族)

affinity labeling (亲和标记) 第一审普通程序的审限是（） ["A.30天","B.3个月","C.6个月","D.12个月"] receptor crossover (受体交叉) enzyme linked receptor (酶联受体) G-protein linked receptor (G-蛋白偶联受体) surface receptor superfamilies (表面受体超家族)