CD40-CD40 L는 친염성 표지자처럼 여겨지며 여러 세포에서 확인되었지만, 순환 수준의 대부분은 혈소판에서 나온다.
The CD40-CD40 L is as considered as a pro-inflammatory marker and has been identified on several cells, however the majority of the circulating levels comes from platelets.