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#Obtain three PCR tubes and lids from your instructor in your team color.
#Label the '''side''' of each PCR tube A, B and C - the marker WILL rub off the top. Tube C will serve as your negative control with no colony added.
#Add 30 ul of master mix to each tube. Your master mix will include: 23 μL H<sub>2</sub>O; 3 μL of PCR buffer (10 mM Tris, 50 mM KCl, 1.5 mM MgCl2 pH 8.3); 0.67 μL of 10 mM dNTPs; 0.67 μL of forward primer (20 μM stock); 0.67 μL of reverse primer (20 μM stock); 1 μL of 2 units/μL Taq polymerase. The primers primer we are using are is for T7 polymeraseand we are only using one primer rather than two for this amplification. Whydo we not need to use both a forward and reverse primer to detect the ''lys-2'' gene in this reaction? <BR>T7 primer sequence:<BR>
#After each tube has master mix, use the sterile end of an autoclaved toothpick (''not'' the end you are touching) or the end of a sterile micropipet tip and gently touch the center of your colony of interest and pick up a tiny, barely visible amount of the bacteria. DO '''NOT TAKE THE ENTIRE COLONY!!!''' Make sure that you select colonies that are large enough to have a significant amount remaining bacteria after taking your sample.


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