Abstract
Covalently closed circular DNA can be isolated rapidly from cell lysates in a two-step process. Hydroxylapatite chromatography to prepurify the plasmid DNA from contaminating protein and RNA is followed by a step gradient elution of covalently closed circular (CCC) plasmid DNA from an acridine yellow affinity column. This procedure results in CCC DNA of a purity comparable to that obtained from ethidium bromide-CsCl gradients without lengthy centrifugation and free of contaimination by intercalating dye. Up to 250 μg of CCC pBR 322 can be isolated from 500 ml of bacterial culture in 4-6 h.
Original language | English (US) |
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Pages (from-to) | 123-127 |
Number of pages | 5 |
Journal | Analytical Biochemistry |
Volume | 110 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 1981 |
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Molecular Biology
- Cell Biology