in this patient 's leukemic cells , the breakpoint of the t ( 14 ; 18 ) translocation occurred in the major breakpoint-cluster region of the bcl2 gene and became linked to the jh4 joining-region gene segment of the immunoglobulin heavy-chain locus on the 14q+ chromosome as previously observed in follicular lymphoma .
C1327813
14q
C0008633
chromosome