PCR Experiment

Aims

The aim of this experiment is to prove that Bacillus subtilis 168 and 3610 chromosomal DNA extraction worked by amplifying ParaE using PCR.

Thermocycler

Loading the gel

Gel

Materials and Protocol

Please refer to: GoTaq PCR protocol.

Result

Figure 1: Gel electrophoresis of the PCR products

• Lane 1: 1 Kb DNA ladder
• Lane 2: B. subtilis 168 chromosomal DNA containing ParaE
• Lane 3: B. subtilis 168 chromosomal DNA containing ParaE
• Lane 4: B. subtilis 3610 chromosomal DNA containing ParaE
• Lane 5: B. subtilis 3610 chromosomal DNA containing ParaE

Discussion

We found bands in lanes 2, 3, 4 and 5 of around 200 bp in size which is an approximate size of the ParaE which is found on the chromosome of both B. subtilis 168 and 3610.

Conclusion

This experiment proves that the DNA extraction from both B. subtilis 168 and 3610 done on 27th July, 2010 was successful.

Plasmid Miniprep Experiment

Aims

The aim of this experiment is to extract plasmid DNA pSB1C3, [http://partsregistry.org/Part:pSB1AK3 pSB1AK3] with [http://partsregistry.org/Part:BBa_B0014 BBa_B0014] and plasmid containing lacI Biobrick from E. coli DH5α cells with the help of Qiagen miniprep kit and confirming the extraction with the help of nanodrop experiment.

Materials and Protocol

Please refer to: Minipreps for Qiagen miniprep protocol and Nanodrop Spectrophotometer for nanodrop protocol.

Result

Figure 2: Gel electrophoresis of the plasmid after restriction digestion with EcoR1.

• Lane 1: 1 kb DNA ladder
• Lane 2: Extraction of pSB1C3 plasmid
• Lane 3: Extraction of pSB1C3 plasmid
• Lane 4: Extraction of plasmid containing lacI
• Lane 5: Extraction of plasmid containing lacI
• Lane 6: Extraction of [http://partsregistry.org/Part:pSB1AK3 pSB1AK3] with [http://partsregistry.org/Part:BBa_B0014 BBa_B0014] plasmid containing double terminator
• Lane 7: Extraction of [http://partsregistry.org/Part:pSB1AK3 pSB1AK3] with [http://partsregistry.org/Part:BBa_B0014 BBa_B0014] plasmid containing double terminator

Table 1: Nanodrop spectrophotometer experiment result. Table represents the amount of plasmid present in µl/ml quantity.

Discussion

We found bands in the lane 2, 3, 4, 5, and 6 showing the presence of plasmid in E. coli DH5α cells. However, the concentration was very low, therefore this will have to be repeated.

Conclusion

This experiment shows that there is plasmid present in the E. coli DH5α cells but they are present in a very low amount possibly due to the ommission of antibiotic in the media.