Bacterial Cell Maintenance Protocol 4 strains of E. coli are used in these studies: JM101 for M13 infection and isolation, XL1BMRF'for M13 or pUC-based DNA transformation, and ED8767 for cosmid DNA transformation. To maintain their respective F' episomes necessary for M13 viral infection, JM101 is streaked onto a M9 minimal media plate and XL1BMRF' is streaked onto an LB plate containing tetracycline. ED8767 is streaked onto an LB plate. These plates are incubated at 37degC overnight. For each strain, 3 ml. of appropriate liquid..
Bacterial Glycerol Stocks Protocol To 2mls of mid-log culture or 1ml of freshly saturated culture add 1ml(or an equal volume) of glycerol solution, mix gently, then freeze rapidly in liquid nitrogen or on dry ice. Store at -20°C and - 70°C.
Maintenance of Probes in Bacteria Including Escherichia coli Protocol Plasmid (pUC series) containing genomic DNA fragments are maintained in E. coli strain DH5aTM. The E. coli cultures are routinely cultured at 37 C on Luria-Bertani (LB) agar on or in LB broth containing Ampicillin (30 µg/ml) or Carbenicillin (50 µg/ml broth, 100 µg/ml agar). E. coli strains are usually preserved in stab agar or glycerol for mid-term storage and lyophilized for long-term storage.
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