the chromosome 9 breakpoint was shown to have occurred within an abl intron , 160 kb upstream of the v-abl homologous sequences , but still 35 kb downstream of the 5'-most abl exon . bcr-abl and abl-bcr fusion genes were demonstrated on the ph1 and the 9q+ chromosomes , respectively ;
C1515510
9q
C0008633
chromosomes