glyoxal + L-cysteinyl-[protein] => S-(1-hydroxy-2-oxoethyl)-L-cysteinyl-[protein]
glyoxal + l-cysteinyl-[protein] => s-(1-hydroxy-2-oxoethyl)-l-cysteinyl-[protein]
glyoxal + L-cysteinyl-[protein] => S-(1-hydroxy-2-oxoethyl)-L-cysteinyl-[protein]
glyoxal + l-cysteinyl-[protein] => s-(1-hydroxy-2-oxoethyl)-l-cysteinyl-[protein]