November
30
PCR and Making of an Agarose Gel (11/28/18)
Rationale:
To find out to which cluster Ferranti belongs, gel electrophoresis will be performed. In preparation for gel electrophoresis, polymerase chain reaction (PCR) will be performed and a 2% agarose gel will be made.
Procedure:
- Once an aseptic zone was established, 12.5 µL of 1X MM, 2 µL of extracted DNA, and 6.5 µL of ddH2O were combined three times into three different microcentrifuge tubes.
- 4 µL of primer 1, primer 2, and primer 3 were placed into their correlating microcentrifuge tubes.
- Placed microcentrifuge tubes in thermo-cycler and activated program STU.
- 40 mL of 1X TAE and 0.8 g of powdered agarose were combined and swirled together in an Erlenmeyer flask.
- Heated the Erlenmeyer flask until the mixture was boiling then mixed solution until the bubbles disappeared. Repeated until the solution was consistent.
- Allowed the solution to cool until it was cool enough to touch.
- Added 2.0 µL of EtBr to the flask to achieve a concentration of 0.5 µg/µL.
- Poured mixture into gel apparatus and placed comb.
- Once the gel solidified, the comb was removed, and TAE buffer was poured over the gel to keep it from drying out.
Observations:
- The thermocycler used the program STU which started with 5 minutes of initial denaturation at 98.0ºC. Then, 35 cycles of 30 seconds at 98.0ºC followed by 30 seconds at 55.0ºC followed by 45 seconds at 72.0ºC occurred. After the cycles, a final extension happened at 72.0ºC for 5 minutes.
- Unfortunately, it was realized later that DNA concentration was not taken into account when making PCR Mix.
- Also, it was realized later that no controls were made.
- The gel form had 8 wells and had a hazy white tint to it. The following picture shows the gel created.
Next Steps:
Perform gel electrophoresis with DNA samples on agarose gel.