Correspondingly, it has also been verified that six members of the SliTrk family located in three different loci: chromosome 3 (SliTrk3), chromosome 13 (SliTrk1, SliTrk5, and SliTrk6), and the X chromosome (SliTrk2 and SliTrk4) [3], all of which are generally expressed in the developing central nervous system at times and locations that are important to neuronal morphogenesis and synaptogenesis [4, 5], as well as in brain tumors, embryonic stem cells, subsets of endothelial cells, hematopoietic stem cells, and in leukemia and lymphoma cells [6], but vary within the family. This evidence concerns the gene SLITRK5 and brain neoplasm.