label: phosphoethanolamine + S-adenosyl-L-methionine <=> N-methylethanolamine phosphate + S-adenosyl-L-homocysteine + H(+)
label_lc: phosphoethanolamine + s-adenosyl-l-methionine <=> n-methylethanolamine phosphate + s-adenosyl-l-homocysteine + h(+)