Reactivity of CHO membranes to anti-CB2 receptor Abs assayed in Western blot. CHO-WT and CHO-CB2 membranes were resolved by SDS-PAGE, transferred to nitrocellulose, and shown with anti-CB2 receptor Abs raised against the C-terminal CB2 receptor peptide. Lane 1, molecular weight markers; lane 2, CHO-CB2 membranes; lane 3, CHO-WT membranes.