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. Extended N-terminus.