What is the use of mRNA ?
In enzymology , a mRNA guanylyltransferase ( ) is an enzyme that catalyzes the chemical reaction GTP + ( 5' ) ppPur - mRNA formula_1 diphosphate + G ( 5' ) pppPur - mRNA Thus , the two substrates of this enzyme are GTP and ( 5' ) ppPur - mRNA , whereas its two products are diphosphate and G ( 5' ) pppPur - mRNA .