preferred_name: an N-terminal trimethyl-L-alpha-aminoacyl-[protein] + 3 S-adenosyl-L-homocysteine + 3 H(+) => an N-terminal L-alpha-aminoacyl-[protein] + 3 S-adenosyl-L-methionine
preferred_name_lc: an n-terminal trimethyl-l-alpha-aminoacyl-[protein] + 3 s-adenosyl-l-homocysteine + 3 h(+) => an n-terminal l-alpha-aminoacyl-[protein] + 3 s-adenosyl-l-methionine
label: an N-terminal trimethyl-L-alpha-aminoacyl-[protein] + 3 S-adenosyl-L-homocysteine + 3 H(+) => an N-terminal L-alpha-aminoacyl-[protein] + 3 S-adenosyl-L-methionine
label_lc: an n-terminal trimethyl-l-alpha-aminoacyl-[protein] + 3 s-adenosyl-l-homocysteine + 3 h(+) => an n-terminal l-alpha-aminoacyl-[protein] + 3 s-adenosyl-l-methionine