CD31
（重定向自PECAM）
![](/Images/godic/202502/01/PBB_GE_PECAM1_208982_at_tn5918.png")
![](/Images/godic/202502/01/PBB_GE_PECAM1_208981_at_tn5918.png")
![](/Images/godic/202502/01/PBB_GE_PECAM1_208983_s_at_tn5918.png")
![Micrograph of an angiosarcoma stained with a CD31 immunostain.](/Images/godic/202502/01/Epithelioid_angiosarcoma_-_CD31_-_intermed_mag5919.jpg")
Platelet endothelial cell adhesion molecule (PECAM-1) also known as cluster of differentiation 31 (CD31) is a protein that in humans is encoded by the PECAM1 gene found on chromosome 17. PECAM-1 plays a key role in removing aged neutrophils from the body.