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This experiment report by Lekiya Feng details the successful selection of E. coli strains through PCR and sequencing, leading to plasmid extraction, L. lactis transformation, and phenotype confirmation. The report outlines the completion of fermentation experiments and plans for future protein electrophoresis and gene elongation studies for enhanced nisin production. The addition of a His-tag to the genes is proposed for further research to contribute to the final paper.
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Experiment results Reporter: lekiya Feng
E.coli hdeB hdeA P45 P45 hdeB hdeA Choose 24 strains randomly in two plates respectively. Add general premiers Colonies PCR Not yes E.coli A:417+261=678 B:415+261=676 The length of PCR product is 261
Yes strains are selected by colonies PCR Sequencing Strains nourishment Yes! Complete correct ! No! experiment fails Plasmid extraction The preparation of Competent L.lactis Endonuclease: BamH1 &Hind111 Aim plasmid enters L.lactis by electrotransformation Aim stripes were located at 678 and 676 respectively. Phenotype Confirmation Screening by antibiotic erythromycin yes NO ! False phenotype Fermentation Experiments Yes! correct Colonies PCR
Next schedules • Protein electrophoresis conformation • fermentation experiment to verify whether addition of the genes can elongate fermentation period and increase nisin production • More accurate experiments results which , from my point of view , could contribute to my final paper is to ligate a His-tag at one end of the genes.
More details I need in order to fulfill the schedules I made in last slide.