O-(5'-guanylyl)-L-tyrosyl-[protein] + diphosphate => L-tyrosyl-[protein] + GTP
o-(5'-guanylyl)-l-tyrosyl-[protein] + diphosphate => l-tyrosyl-[protein] + gtp
O-(5'-guanylyl)-L-tyrosyl-[protein] + diphosphate => L-tyrosyl-[protein] + GTP
o-(5'-guanylyl)-l-tyrosyl-[protein] + diphosphate => l-tyrosyl-[protein] + gtp