Optimasi metode lisis alkali untuk meningkatkan konsentrasi plasmid: Optimization of alkaline lysis method for the improvement of plasmid concentration

Plasmids are extra chromosomal molecules of DNA that replicate autonomously and found in prokaryote and eukaryote cells. There are a number of methods that are used to isolate plasmids, such as alkaline lysis, boiling lysis, using cesium chloride, and chromatography. Amongst the disadvantages in plasmid isolation methods are lengthy time especially when handling a large number of samples, high cost, and low purity. Alkaline lysis is the most popular for plasmid isolation because of its simplicity, relatively low cost, and reproducibility. This method can be accomplished in 50 minutes to one hour. In this research, the alkaline lysis method was developed to obtain suitable plasmid for applications in a molecular biology laboratory. The aim of this research was to reduce contaminants and improve yield of plasmid. The result of isolation of pICZA plasmid in Escherichia coli gave the concentration of 3.3 to 3.8 µg/µL with the purity of 1.99