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Reaction Details
Reaction:	4.0 + 1.0 → 1.0 + 4.0
	4.0Porphobilinogen + 1.0Water → 1.0Hydroxymethylbilane + 4.0Ammonia
Enzymes:	Porphobilinogen deaminase
External Links:	Resource Link Kegg Reaction ID: R00084 EcoCyc Reaction ID: OHMETHYLBILANESYN-RXN
References:	Uniprot Consortium (2012). "Reorganizing the protein space at the Universal Protein Resource (UniProt)." Nucleic Acids Res 40:D71-D75. Pubmed: 22102590