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Western blot immunodetection of the β4 integrin in protein extract from mouse epididymal sperm with mouse monoclonal anti-β4 integrin (sc-13543) antibody; (1) antibody reaction in protein extract from mouse sperm, (2) negative control with mouse IgG; detection of 200 kDa protein band corresponds to β4 integrin (black arrow), possible high molecular weight isoforms (white arrows), non-specific reaction (grey arrows).
