EC 3.5.4.24     
Accepted name: sepiapterin deaminase
Reaction: sepiapterin + H2O = xanthopterin-B2 + NH3
Systematic name: sepiapterin aminohydrolase
Comments: Also acts on isosepiapterin, but more slowly.
References:
1.  Tsusué, M. Studies on sepiapterin deaminase from the silkworm, Bombyx mori. Purification and some properties of the enzyme. J. Biochem. (Tokyo) 69 (1971) 781–788. [PMID: 5572808]
[EC 3.5.4.24 created 1976]