May be a transcriptional repressor of NRL function in photoreceptors. Does not repress CRX-mediated transactivation (By similarity). Interacts with FLT3 cytoplasmic catalytic domain, following receptor stimulation, in a kinase-independent manner. Does not interact with other structurally related receptor tyrosine kinases, including KIT, CSF1R and PDGFR. Interacts with NRL (By similarity). Widely expressed. In the retina, highest expression in the ganglion cell layer. Expressed in the retina at 14.5 dpc.