Type B leukemogenic virus (TBLV) induces rapidly appearing T-cell leukemias
. TBLV insertions near the c-myc gene were detectable in 2 of 30 tumors tes
ted, whereas 80% of the tumors showed c-myc overexpression. TBLV insertions
on chromosome 15 (including a newly identified locus, Pad7) may cause c-my
c overexpression by cis-acting effects at a distance.