The flanking sequences for the foxoc431 deletion that we generated are 5'-CGGCCTGGCCATGGACCAGC...431bp...GGATGGAAGGTGAGTTATTC-3' The sgRNAs used to create the deletion are 5'-GGGGCAGATCCCCGCCCAGC-3' 5'-GGGCGATTCGAATAGCAGTGC-3' The primers used to verify the deletion are F:5 '-AGCCGCAAAGCTGCAACTGCACAAC-3' R:5 '-CCCAGCTCGATACTTTCACTTTTTA-3'