Si dhakhso leh uga nadiifi DNA-da plasmid ee tayada sare leh bakteeriyada la beddelay ee tijaabooyinka bayoolojiga joogtada ah sida isbeddelka iyo dheefshiidka ensaymka.
◮Ka saar RNA adigoon ku darin RNase
◮Ku habboon-centrifugation-ka waxaa lagu sameeyaa heerkulka qolka
◮Degdeg ah-qaliinka waxa lagu dhamayn karaa 20 daqiiqo
◮Ammaan- lama isticmaalo reagent organic
◮daahirnimo sare-OD260/280≈1.7-1.9