Description_x000D_ Packaging_x000D_ 1, 5 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Dihydroeponemycin is an active derivative of eponemycin an antitumor antibiotic isolated from Streptomyces hygroscopicus. Dihydroeponemycin labels the catalytic threonine residues of the immunoproteasome subunits LMP2 and LMP7 and the constitutive proteasome subunit X, while epoxomicin covalently modifies the N-terminal catalytic threonine residues of the constitutive proteasome (X and Z) and immunoproteasome (LMP7 and MECL1) subunits.