Main Reaction: Glycine >> serine

Reference: PubMed ID: 17445548
Authors: Baggott JE, Gorman GS, Tamura T
Title: 13C enrichment of carbons 2 and 8 of purine by folate-dependent reactions after [13C]formate and [2-13C]glycine dosing in adult humans.
Published: 2007 May

Glycine --> serine