| 摘要 |
<p>The present invention provides a novel helper phage and phagemid and phagemid display system that comprises an amber mutation in gene 3 of the helper phage so that it is not expressed in the non-permissive bacteria and an in-frame stop codon in the phagemid prior to the gene 3 coding sequence that prevents expression of g3p unless a foreign gene is inserted therein, thus preventing propagation of insert-less phagemids. This results in improved display of foreign gene products on individual virions, avoidance of virions lacking foreign gene inserts and the creation of large phage display libraries.</p> |
