A protein complex capable of pyruvate kinase activity. PKM2 only exists as homotetramer when bound to beta-d-fructofuranose 1,6-bisphosphate (CHEBI:28013).
Source:
GOC:bhm,
PMID:24606918
Comment
An example of this is PKM2 in human (P14618) in PMID:24606918 (inferred from direct assay).