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Immunolocalization of α2A-AR in human bone samples from an OP patient (A and C), OA patient (B) and an autopsy case (D). Positive α2A-AR staining was observed in cuboidal shaped osteoblasts (Ob) and lining cells (Lc). No staining was observed in any of the control slides where no α2A-AR antibody was applied (negative control, data not shown).
