Fibroblast activation protein alpha (FAP-alpha) also known as prolyl endopeptidase FAP is an enzyme that in humans is encoded by the FAPgene.[5]
Prolyl endopeptidase FAP is a 170 kDa membrane-bound gelatinase. It was independently identified as a surface glycoprotein recognized by the F19 monoclonal antibody in activated fibroblasts[6] and a Surface Expressed Protease (seprase) in invasive melanoma cells.[7][8]
^Monsky WL, Lin CY, Aoyama A, Kelly T, Akiyama SK, Mueller SC, Chen WT (November 1994). "A potential marker protease of invasiveness, seprase, is localized on invadopodia of human malignant melanoma cells". Cancer Research. 54 (21): 5702–10. PMID7923219.