 Low-grade brain tumors (pilocytic astrocytomas) that result from a genomic rearrangement in which the BRAF kinase domain is fused to the amino terminal of the KIAA1549 gene (KIAA1549:BRAF fusion.     ///    "To model this temporal and spatial specificity in mice, we generated conditional KIAA1549:BRAF strains that coexpresses green fluorescent protein (GFP)."    ///    The availability of this unique KIAA1549:BRAF conditional transgenic mouse strain will enable future mechanistic studies aimed at defining the developmentally-regulated temporal and spatial determinants that underlie low-grade astrocytoma formation in children..     ///    Using Cre driver lines in which KIAA1549:BRAF expression was directed to NSCs (f-BRAF.     ///    Conditional KIAA1549:BRAF mice reveal brain region- and cell type-specific effects..     ///    "To model this temporal and spatial specificity in mice, we generated conditional KIAA1549:BRAF strains that coexpresses green fluorescent protein (GFP). "