a 5'-end (5'-triphosphoguanosine)-ribonucleoside in mRNA + S-adenosyl-L-methionine = a 5'-end (N(7)-methyl 5'-triphosphoguanosine)-ribonucleoside in mRNA + S-adenosyl-L-homocysteine
a 5'-end (5'-triphosphoguanosine)-ribonucleoside in mrna + s-adenosyl-l-methionine = a 5'-end (n(7)-methyl 5'-triphosphoguanosine)-ribonucleoside in mrna + s-adenosyl-l-homocysteine
"messenger RNA guanine 7-methyltransferase"
"messenger rna guanine 7-methyltransferase"