label: phosphocholine + 3 S-adenosyl-L-homocysteine + 3 H(+) => phosphoethanolamine + 3 S-adenosyl-L-methionine
label_lc: phosphocholine + 3 s-adenosyl-l-homocysteine + 3 h(+) => phosphoethanolamine + 3 s-adenosyl-l-methionine