Synonyms:Anchorin CII, Annexin 5, annexin A5, Annexin V, ANX5, ANXA5, Calphobindin I, CBP I, Endonexin II, ENX2, Lipocortin V, PAP I, PP4, Thromboplastin inhibitor, VAC alpha, Vascular anticoagulant alpha Background:Annexin A5(ANXA5), is a member of the structurally related family of?annexin?proteins some of which have been implicated in membrane-related events along exocytotic and endocytotic pathways. Annexin 5 is a phospholipase A2 and protein kinase C inhibitory protein with calcium channel activity and a potential role in cellular signal transduction, inflammation, growth and differentiation. Annexin 5 has also been described as placental anticoagulant protein I, vascular anticoagulant-alpha, endonexin II, lipocortin V, placental protein 4 and anchorin CII.