His laboratory constructed a series of oncogenes that could be switched on and off at will .
In 1988 Martin Zenke started to work on retroviral oncogenes , in particular on the v - erbA and v - rel oncogenes .
Martin Zenke 's laboratory constructed a series of oncogenes that could be switched on and off at will .
In 1988 Martin Zenke started to work on retroviral oncogenes , in particular on the v - erbA and v - rel oncogenes .