![ExAssist Helper Phage ExAssist Helper Phage](/cs/publishingimages/Black box 2-320x320.jpg)
ExAssist Helper Phage
The ExAssist helper phage is designed to allow efficient in vivo excision of the pBK-CMV phagemid vector from the ZAP Express vector while preventing problems with helper phage co-infection. The ExAssist helper phage allows simple and rapid excision of multiple clones. Excision efficiency is monitored at the clonal level.