transforming growth factor beta complex https://github.com/geneontology/go-ontology/issues/31130 TGFbeta complex A protein complex acting as ligand of the transforming growth factor beta receptor complex, typically a homodimer of any of the TFGbeta isoforms. The precursor of TGFbeta proteins is cleaved into mature TGFbeta and the latency-associated peptide (LAP), which remains non-covalently linked to mature TGFbeta rendering it inactive. TGFbeta is activated by dimerization and dissociation of the LAP. TGF-beta dimer bhm TGFB dimer TGF-beta complex TGFB complex cellular_component TGFbeta dimer GO:0099126 extracellular protein-containing complex