preferred_name: S-(2-succinyl)-L-cysteinyl-[protein] => L-cysteinyl-[protein] + fumarate
preferred_name_lc: s-(2-succinyl)-l-cysteinyl-[protein] => l-cysteinyl-[protein] + fumarate
label: S-(2-succinyl)-L-cysteinyl-[protein] => L-cysteinyl-[protein] + fumarate
label_lc: s-(2-succinyl)-l-cysteinyl-[protein] => l-cysteinyl-[protein] + fumarate