== The structure of HTLV-1
== The structure of HTLV-1. that HTLV-1 infection dramatically increases the risk of leukemia generation from peripheral CD4 T-cells, in which the incidence of leukemia is quite low. Furthermore, the evidence that all ATL cases retain the HTLV-1 provirus, especially the 3 region, indicates that HTLV-1-encoded genes play a critical role in leukemogenesis. Since increasing…