butyrate metabolic process pyruvate fermentation pyruvate fermentation to butanoate https://github.com/geneontology/go-ontology/issues/24644 https://github.com/geneontology/go-ontology/issues/29511 https://github.com/geneontology/go-ontology/issues/31679 pyruvate fermentation via PFOR biological_process MetaCyc:CENTFERM-PWY GO:0044813 jl The anaerobic chemical reactions and pathways resulting in the breakdown of pyruvate into butanoate. This pathway is found in strict anaerobes such as Clostridia species. 2013-09-18T16:04:00Z glycolytic fermentation via PFOR pathway