| 摘要 |
<p>A drug resistant strain of P.chrysogenum has said drug resistance conferred by heterologous DNA, in particular a heterologous gene(s) under the control of a Penicillium control sequence(s). Drug resistance is especially to sulphonomides, or to trimethoprim or methotrexate by a gene derived from plasmid R388. A vector capable of conferring resistance to methotrexate or sulphonamide on P.chrysogenum, comprises at least one said resistance gene under the control of trpC controlling sequences.</p> |
