FIG. 4.
In vitro binding of 35S-labeled PSF-A to full-length GST-TR and GST-RXR. PSF-A and NonO were synthesized in vitro using rabbit reticulocyte lysates and radiolabeled with [35S]methionine. (A) Equal amounts of 35S-PSF-A were incubated with different GST proteins (∼300 ng) bound to glutathione-agarose beads. PSF-A binds to GST-TR and GST-RXR but not to GST alone. (B) In contrast with the findings for 35S-PSF-A, 35S-NonO does not bind to full length GST-TR or GST-RXR.