Yeretsani mwachangu DNA ya plasmid yapamwamba kwambiri kuchokera ku mabakiteriya osinthidwa kuti muyesere pafupipafupi pazamoyo za mamolekyulu monga kusintha ndi kugaya kwa ma enzyme.
◮Chotsani RNA popanda kuwonjezera RNase
◮Zosavuta- centrifugation ikuchitika kutentha firiji
◮Mofulumira-Opaleshoniyo imatha kutha mphindi 20
◮Otetezeka- palibe organic reagent yomwe imagwiritsidwa ntchito
◮Chiyero chachikulu—OD260/280≈1.7-1.9