L-histidine catabolic process https://github.com/geneontology/go-ontology/issues/30202 https://github.com/geneontology/go-ontology/issues/31405 histidine catabolism The chemical reactions and pathways resulting in the breakdown of L-histidine. histidine breakdown MetaCyc:PWY-5028 biological_process Reactome:R-HSA-70921 MetaCyc:HISDEG-PWY histidine catabolic process MetaCyc:PWY-5030 MetaCyc:PWY-5031 MetaCyc:HISTDEG-PWY histidine degradation MetaCyc:HISHP-PWY GO:0006548 aromatic amino acid catabolic process imidazole-containing compound catabolic process L-amino acid catabolic process proteinogenic amino acid catabolic process