The methylation of the purines of soluble ribonucleic acid with methyllabeled methionine.
D008715:Methionine / Q000737:chemistry*; D008745:Methylation; D011687:Purines / Q000737:chemistry*; D012313:RNA / Q000737:chemistry*
D011687:Purines; D012313:RNA; D008715:Methionine; C030985:purine
METHIONINE/chemistry; PURINES/chemistry; RIBONUCLEIC ACID/chemistry