label: 2-[(3S)-amino-3-carboxypropyl]-L-histidyl-[translation elongation factor 2] + 4 S-adenosyl-L-methionine <=> diphthine methyl ester-[translation elongation factor 2] + 4 S-adenosyl-L-homocysteine + 3 H(+)
label_lc: 2-[(3s)-amino-3-carboxypropyl]-l-histidyl-[translation elongation factor 2] + 4 s-adenosyl-l-methionine <=> diphthine methyl ester-[translation elongation factor 2] + 4 s-adenosyl-l-homocysteine + 3 h(+)