Serum amyloid P component
（重定向自Serum amyloid P）
![](/Images/godic/202502/10/SAP5131.png")
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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 constituent of in vivo pathological deposits called "amyloid". APCS is its human gene.