Calpain inhibitor I; N-[N-(N-Acetyl-L-leucyl)-L-leucyl]-L-norleucine Specificity: Cell permeable peptide aldehyde inhibitor of calpain I and to a lesser extent calpain II. Also inhibits other neutral cysteine proteases, cathepsin B and L and the proteasome. Solubility: Soluble in DMSO or…