N-terminal N,N,N-trimethyl-glycyl-L-lysyl-L-glutamyl-[protein] + 3 S-adenosyl-L-homocysteine + 3 H(+) => N-terminal glycyl-L-lysyl-L-glutamyl-[protein] + 3 S-adenosyl-L-methionine
n-terminal n,n,n-trimethyl-glycyl-l-lysyl-l-glutamyl-[protein] + 3 s-adenosyl-l-homocysteine + 3 h(+) => n-terminal glycyl-l-lysyl-l-glutamyl-[protein] + 3 s-adenosyl-l-methionine
N-terminal N,N,N-trimethyl-glycyl-L-lysyl-L-glutamyl-[protein] + 3 S-adenosyl-L-homocysteine + 3 H(+) => N-terminal glycyl-L-lysyl-L-glutamyl-[protein] + 3 S-adenosyl-L-methionine
n-terminal n,n,n-trimethyl-glycyl-l-lysyl-l-glutamyl-[protein] + 3 s-adenosyl-l-homocysteine + 3 h(+) => n-terminal glycyl-l-lysyl-l-glutamyl-[protein] + 3 s-adenosyl-l-methionine