p-Hydroxyphenylglyoxal (HPG) is a protein modification reagent that reacts with arginine residues to give a large increase in absorbance at approximately 340 nm. HPG is a better choice for amino acid side chain modification due to its increased water solubility over phenylglyoxal and HPG modifier-associated improved oxidation resistance over p-nitrophenylglyoxal.
Molecular Formula: C8H6O3
Molecular Weight: 168.15
CAS Number: 24645-80-5
Synonyms: p-Hydroxyphenylglyoxal monohydrate; 4-hydroxyphenylglyoxal; HPG