Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Diagram of the retroviral vectors used in the serial transplants. The relevant differences are highlighted. MPSV, LTR from the myeloproliferative sarcoma virus; NCR, negative control region; dl PBS, PBS from the dl587rev virus; Thy, 214-bp hypomethylation signal from the murine Thy-1 gene promoter/enhancer.
