n leucine rich transmembrane protein 3.23 The gene is expressed in various tissues, including brain, and is well conserved across species.24 The protein it encodes modulates homotypic cell adhesion and promotes fibroblast growth factor signaling,24 which is potentially involved in angiogenesis and neurogenesis.25 In animal experiments, FLRT3 was shown to promote neurite outgrowth after axonal inju