<prompt> Conversion of glycine to serine requiresFolic acidThiamineVit. CFe2  <response>: Conversion of glycine to serine require folic acid. From serine, The beta carbon of serine is channelled into the one-carbon pool, carried by THFA tetrahydro folic acid. The alpha carbon of serine becomes the alpha carbon of glycine. Serine is the most impoant source of One-Carbon units Serine Hydroxy Methyl Transferase is the enzyme involved in this pathway. Ref: DM Vasudevan - Textbook of Biochemistry, 8th edition, page no: 475 