A chemical reagent that reacts with and modifies chemically the tryptophan portion of protein molecules. Used for 'active site' enzyme studies and other protein studies. Sometimes referred to as Koshland's reagent.

Synonyms: Reagent, Koshlands Koshland Reagent Reagent, Koshland Koshland's Reagent I Phenol, 2-(bromomethyl)-4-nitro- 2-Hydroxy-5-nitrobenzyl Bromide 772-33-8 Koshland Reagent I Koshlands Reagent I Koshlands Reagent 2 Hydroxy 5 nitrobenzyl Bromide Reagent I, Koshland's