Main Reaction: GTP >> Dihydroneopterin triphosphate

Reference: PubMed ID: 6726234
Authors: Culvenor AJ, Miller LP, Levine RA, Lovenberg W
Title: Effects of methotrexate on biopterin levels and synthesis in rat cultured pineal glands.
Published: 1984 Jun

GTP --> Dihydroneopterin triphosphate