AGN 194078 binds to RARα with very high affinity (Kd: 3 nM), while being unable to bind to RARβ and binding only very weakly (Kd=5600 nM) to RARγ. Furthermore, AGN 194078 maintains full transcriptional activity through RARα, with an EC50 value of 112 nM, but only activated RARβ and RARγ with about 10% efficacy at the highest dose (1000 nM) tested.