The serum amyloid P component (SAP) is the identical serum form of amyloid P component (AP), a 25kDa pentameric protein first identified as the pentagonal.. Serum amyloid P component (SAP) is a glycoprotein in human ... Arrhythmia and Electrophysiology · Basic, Translational, and ... The character of SAP in each extract was studied with double .... The amounts of SAP in extracts were measured by electroimmunoassay following the method of Laurell.