Fig. 6. Quantification of mRNA of AmphTR2/4 and AmphiRAR by RT-PCR normalized to that of cytoplasmic actin in 15 hour embryos treated with 2x10^–6 M RA (RA), in control embryos treated with DMSO alone (0) and with 2x10^–6 M BMS009 (BMS009). Even when additional sample was loaded, no amplification of AmphiRAR was detectable in BMS009-treated embryos.