DDR2 is a newly identified receptor protein tyrosine kinase, which is composed of three parts: DR region on the N terminus, a long justatransmembrane region (JM) between DR region and transmembrane region, and intracellular region in cytoplasma.

• DDR2是一类新发现的受体型蛋白酪氨酸激酶，其分子结构由三部分组成：一是N端的DR区，二是在DR与跨膜区之间的很长的邻跨膜区(justatransmembrane region，JM)，三是在胞浆内的胞内区。