This propeptide is known as latency associated peptide (LAP) in TGF-beta. LAP is a homodimer which is disulfide linked to TGF-beta binding protein.

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2: Latent transforming growth factor-beta: structural features and mechanisms of activation. Munger JS, Harpel JG, Gleizes PE, Mazzieri R, Nunes I, Rifkin DB; Kidney Int 1997;51:1376-1382. PMID:9150447