Originally isolated from Actinomycetes strain based on its potent in vivo antitumor activity, Epoxomicin is a potent, cell-permeable, selective and irreversible proteasome inhibitor. More potent inhibitor of the chymotrypsin-like activity of the proteasome than Lactacystin. Blocks also trypsin-like and PGPH activities of the proteasome.Formula:C28H50N4O7Solubility:DMSO (~10mg/ml)Molecular Weight: ~554.7Storage and Stability:Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.