ID 3.5.4.20 DE pyrithiamine deaminase. CA 1-(4-amino-2-methylpyrimid-5-ylmethyl)-3-(2-hydroxyethyl)-2- CA methylpyridinium + H(+) + H2O = 1-(4-hydroxy-2-methylpyrimid-5-ylmethyl)- CA 3-(2-hydroxyethyl)-2-methylpyridinium + NH4(+). //