层粘连蛋白是一种高分子糖蛋白,是由一条重链(α链)和两条轻链(β1

层粘连蛋白是一种高分子糖蛋白,是由一条重链(α链)和两条轻链(β1、β2链)构成,并存在不同受体结合位点(结构如下图)。下列有关叙述正确的是(  )

 

A.层粘连蛋白在细胞的识别中具有作用

B.层粘连蛋白与斐林试剂发生反应生成砖红色沉淀

C.若层粘连蛋白由m个氨基酸组成,则含有(m-3)个肽键

D.层粘连蛋白的合成与核糖体有关

 

答案

B

由题干可知,层粘连蛋白是糖蛋白,但并不一定含还原糖,因此选项B错误。

 

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