Purity ~ 95% by HPLC. Oligomycin B, a minor component of the oligomycin complex isolated from selected strains of Streptomyces sp., is an inhibitor of mitochondrial F1F0-ATPase. It makes cells more susceptible to cell death and also leads to a switch in the death mode from apoptosis to necrosis. Related to: Oligomycin A, Oligomycin C, 21-hydroxyoligomycin A Solubility: Soluble in ethanol, methanol, DMF or DMSO.