1DKF      2.50    LIG: BMS OLA       COF:        ION:        : PROTEIN (RETINOID X RECEPTOR-ALPHA)
1XDK      2.90    LIG: REA       COF:        ION:        : RETINOIC ACID RECEPTOR RXR-ALPHA
3A9E      2.75    LIG: 754       COF:        ION:        : RETINOIC ACID RECEPTOR RXR-ALPHA