EOG89363B GO:0005581 1/2 collagen trimer cellular_component "A protein complex consisting of three collagen chains assembled into a left-handed triple helix. These trimers typically assemble into higher order structures." [GOC:dos, GOC:mah, ISBN:0721639976, PMID:19693541, PMID:21421911] EOG89363B GO:0005201 1/2 extracellular matrix structural constituent molecular_function "The action of a molecule that contributes to the structural integrity of the extracellular matrix." [GOC:mah]