®-O-CH20 NH2 H 5-Phospho-B- H H D-ribosylamine OH OH Glycine ② ATP ADP+Pi NH3 H2C Glycinamide ribonucleotide (GAR) NH R
NH3 H2C Glycinamide 0-C ribonucleotide(GAR) NH R Nio-Formyl Ha folate 3 Ha folate H H2C C-H Formylglycinamide 0=C ribonucleotide (FGAR) NH R
H Formylglycinamide ribonucleotide (FGAR) R Glutamine Glutamate ④ ATP ADP+Pi H H2 Formylglycinamidine HN- ribonucleotide (FGAM) NH R
H H2C C-H Formylglycinamidine HN-C. ribonucleotide(FGAM) NH R ATP → ADP P H20 HC CH 5-Aminoimidazole ribonucleotide (AIR) H2N N R
AIR HCO3 6 ATP ADP Pi N HC CH N5-Carboxyaminoimidazole ribonucleotide O-C-N (N5-CAIR) R