label: internal mRNA (guanine-N7-)-methyltransferase activity
label_lc: internal mrna (guanine-n7-)-methyltransferase activity
description: "Catalysis of the reaction: a guanosine in mRNA + S-adenosyl-L-methionine = an N(7)-methylguanosine in mRNA + S-adenosyl-L-homocysteine."