C13orf24 IS Also Known AS Progesterone-induced-blocking factor. 1 (PIBF1). PIBF1 IS Synthesized by lymphocytes of Healthy a pregnant Women in The Presence of progesterone and inhibits arachidonic acid Release, by acting On the phospholipase A2 enzyme, inducing a Th2 biased immune response. It also controls NK activity, and modifies the cytokine balance exerting an anti-abortive effect.; Tested Applications: HPLC; Conjugation: Unconjugated