The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
Use a concentration of 1 µg/ml. Predicted molecular weight: 28 kDa. Good results were obtained when blocked with 5% non-fat dry milk in 0.05% PBS-T.
CTRB1 (Chymotrypsinogen B1) is the inactive precursor of Alpha chymotrypsin, one of a family of serine proteases secreted into the gastrointestinal tract. The zymogen is activated by proteolytic cleavage by trypsin.