preferred_name: S-(1-hydroxy-2-oxoethyl)-L-cysteinyl-[protein] => glyoxal + L-cysteinyl-[protein]
preferred_name_lc: s-(1-hydroxy-2-oxoethyl)-l-cysteinyl-[protein] => glyoxal + l-cysteinyl-[protein]
label: S-(1-hydroxy-2-oxoethyl)-L-cysteinyl-[protein] => glyoxal + L-cysteinyl-[protein]
label_lc: s-(1-hydroxy-2-oxoethyl)-l-cysteinyl-[protein] => glyoxal + l-cysteinyl-[protein]