CD18 RARE binding of RAR and RXR.

EMSA was performed following incubation of³²P-radiolabeled CD18 RARE probe with human RAR (hRAR) and/or no added protein (lane 1), hRXR (lanes 2-6), and competition with 100-fold molar excess of unlabeled homologous probe (lane 5) or irrelevant probe (lane 6). Filled arrows indicate RAR/RXR–binding species, and the open arrow indicates unbound probe.