pBluescript II has a 21 restriction enzyme polylinker flanked by BsshII sites. pBluescript only has 10 rest. enzymes in its polylinker. Pat M. In article <32AB789A.297F at darkwing.uoregon.edu>, prigge at DARKWING.UOREGON.EDU (Mike Prigge) wrote: > Does anyone know the difference between these two vectors? > Thanks > Mike