Interaction in vitro; bait produced as a recombinant fusion protein in bacterial system; prey produced and labeled by in vitro transcription.
Binding of aret protein to gcl RNA is mediated by the A1 region and does not require the BRE-like (BRL) region.
aret can bind the BRL motif in the gcl 3\' UTR if and only if it is present in multiple tandem copies.