例句與造句

1. Semaphorin 4D ( Sema 4D ) is an axon guidance molecule which is secreted by oligodendrocytes and induces growth cone collapse in the central nervous system.
2. Semaphorin 4D is cleaved from its membrane bound form by MT1-MMP ( MMP-14 ) in tumor cells; it then interacts with plexin B1 on endothelial cells promoting pro-angiogenic chemotaxis.
3. I-set domains are also present in several other diverse protein families, including several tyrosine-protein kinase receptors, the hemolymph protein hemolin, the muscle proteins titin, telokin, and twitchin, the neuronal adhesion molecule axonin-1, and the signalling molecule semaphorin 4D that is involved in axonal guidance, immune function and angiogenesis.
4. It's difficult to find semaphorin 4d in a sentence. 用semaphorin 4d造句挺難的