Source:http://linkedlifedata.com/resource/umls/id/C2754639
GO: A cell projection that emerges from the ECM-facing surface of a cell, is enriched in actin and associated cytoskeletal proteins, and displays localized proteolytic activity toward the substrate. [GOC:mah, PMID:16651416, PMID:19491051, PMID:19931459]