ErpD/Arp37 is suitable as a control in immunological assays. Specific conditions for reactivity should be optimized by the end user. Expect bands at 78 kDa for Arp37-MBP, (~35.6 kDa for Arp37 and 42.4 kDa for MBP) in size corresponding to ErpD/Arp37 by Western blotting in the appropriate cell lysate or extract.