Fig. 6.
Modulation of levels of cyclin A1 RNA by retinoids selective for different retinoid acid receptor isoforms.
NB4 cells were treated with the indicated ligands (5 × 10−7 mol/L) for 3 days, and Northern blot was performed with the simultaneous use of the 32P-labeled cyclin A1 and cyclin A probes. On each lane, 20 μg total RNA was loaded.