label: geranylgeranyl diphosphate + L-cysteinyl-[protein] = S-geranylgeranyl-L-cysteinyl-[protein] + diphosphate
label_lc: geranylgeranyl diphosphate + l-cysteinyl-[protein] = s-geranylgeranyl-l-cysteinyl-[protein] + diphosphate