is_about glycoprotein cardiovascular disorder C4b-binding protein alpha chain glycoprotein measurement C4BP measurement true C4b binding protein levels C4b-binding protein levels A C4BP measurement is the quantification of C4BP, it controls the classical pathway of complement activation. It binds as a cofactor to C3b/C4b inactivator (C3bINA), which then hydrolyzes the complement fragment C4b. It also accelerates the degradation of the C4bC2a complex (C3 convertase) by dissociating the complement fragment C2a. Alpha chain binds C4b. It interacts also with anticoagulant protein S and with serum amyloid P component. (Uniprot defintion). Buil et al, 2010 propose that C4BP may be a susceptibility locus for venous thrombosis based on GWAS and gene expression studies. Helen Parkinson C4b-binding protein measurement http://en.wikipedia.org/wiki/C4b-binding_protein cardiovascular disease biomarker measurement