Biosynthesis of the purines.  X.  Further studies in vitro on the metabolic origin of nitrogen atoms 1 and 3 of the purine ring.
D066298:In Vitro Techniques; D007554:Isotopes; D053858:Metabolic Networks and Pathways; D009584:Nitrogen; D011687:Purines / Q000378:metabolism*
D007554:Isotopes; D011687:Purines; D009584:Nitrogen; C030985:purine
PURINES/metabolism