Fast-Media® Amp XGal Agar Microwaveable medium for selection of E. coli transformants Fast-Media® Amp X-gal formulation is a LB based agar medium supplemented with ampicillin, X-Gal and IPTG. It is used for detection of blue/white resistant colonies after transformation by a vector carrying LacZ gene. 1 pouch = 8-10 agar plates Selective Antibiotic: Ampicillin Stability: 48h at 37°C or 4 weeks ar 4°C Sterility guaranteed