| Interaction of retinal bZIP transcription factor NRL with Flt 3 interacting zinc finger protein Fiz 1 : possible role of Fiz 1 as a transcriptional repressor . ^^^ To further elucidate the molecular mechanism ( s ) underlying NRL mediated transcriptional regulation , we used yeast two hybrid screening to isolate NRL interacting proteins in the retina and report the identification of Flt 3 interacting zinc finger protein , Fiz 1 . ^^^ The mRNA and the protein for both Fiz 1 and its only other known interacting protein Flt 3 , a receptor tyrosine kinase , are expressed in the retina . ^^^ |