CXCR4 is a 352 amino acid rhodopsin-like G protein-coupled receptor and CXCL12 is the only ligland for CXCR4.

• CXCR4是一个由352个氨基酸构成的视紫红质样G蛋白偶联受体,趋化因子CXCL12是该受体的唯一配体。