H. Mano et al., IDENTIFICATION OF A NUCLEAR RETINOIC ACID-BINDING ACTIVITY REPRESENTATIVE OF ENDOGENEOUS RETINOIC ACID RECEPTORS IN THE NUCLEI OF RAT-LIVERAND TESTIS, Bioscience, biotechnology, and biochemistry, 57(8), 1993, pp. 1400-1402
We found a nuclear RA-binding activity by using a sucrose-density-grad
ient assay from rat liver and testis. From the sedimentation analysis,
and the comparison with cloned RARs, it is likely that these binding
activities represent endogenous RARs. Furthermore we showed that these
binding activities were constant irrespective of the retinoid status
in the rat.