Pterin-4-alpha-carbinolamine dehydratase 2, PCBD2, PHS 2, 4-alpha-hydroxy-tetrahydropterin dehydratase 2, DcoH-like protein DCoHm, Dimerization cofactor of hepatocyte nuclear factor 1 from muscle, HNF-1-alpha dimerization cofactor, PCBD2, DCOH2, DCOHM
Involved in tetrahydrobiopterin biosynthesis. Seems to both prevent the formation of 7-pterins and accelerate the formation of quinonoid-BH2. Regulates the dimerization of homeodomain protein HNF-1-alpha and enhances its transcriptional activity.