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.
TK gene integrity and expression in recurred tumors. (A) Southern blot analysis showed the TK gene specific fragments of 1.0 and 0.8 kb in all six recurred tumors. (B) RT-PCR assay failed to show the TK-specific fragment detected in the transduced TK+ PLC/PRF/5 cells. RT-PCR for human β-actin serves as an internal control. PCR with or without reverse transcriptase is represented by + or −, respectively.
