0 a type of virus that includes some cancer viruses and HIV (= the virus that causes AIDS, a serious disease that destroys the body's ability to fight infection)
We have always lived in a tough, dynamic neighbourhood-rats, radon, retrovirus-and we always will.
They were revealed as the transforming principle of oncogenic retroviruses.
One major evolutionary question that is still unanswered is the nature of the relationships among different types of transposon and between retrotransposons and retroviruses.
In the future, they might be of benefit in sheltering endogenous genes from retrovirus-induced transcription.
Figure 4 illustrates the use of a replicationdefective retrovirus as a vehicle for gene delivery.
The evolutionary relationship between retroviruses and retroelements is also becoming clearer.
Retrovirus-like elements transcribe, their transcript is spliced by the host and two to three proteins required for transposition are translated from it.
Cells were fixed 8 days or at other time points, as specified, after the addition of the growth factor or retrovirus.
