Investigation of a tetracycline-regulated phage display system

A new vector (pGZ1) was developed for bacterial phage display of antibody fragments using a transcriptional regulation element with tight control. The tet(p/o)-based phasmid exhibits fully suppressed scFv background synthesis in the absence of inducer and is independent of glucose as a catabolite repressor. The vector is shown to be a useful alternative to commonly used lac(p/o)-regulated systems.