Isolation of High‐Molecular‐Weight DNA from Mammalian Cells

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Abstract

A preparative method for isolating high‐molecular‐weight DNA from animal cells is described. This method is based on the use of proteinase K, a powerful proteolytic enzyme with a broad action spectrum, which is very active in the presence of sodium dodecylsulfate and ethylene‐diamine tetraacetate. The DNA preparation is free of RNA, protein and degrading enzymes. The number‐average molecular weight of the native DNA is 190 × 106, whereas it is 90 × 106 for single‐stranded DNA, indicating that the DNA molecules do not contain single‐stranded nicks. The native DNA molecules range in molecular weight from 40 × 106 to more than 500 × 106. Copyright © 1973, Wiley Blackwell. All rights reserved

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Gross‐Bellard, M., Oudet, P., & Chambon, P. (1973). Isolation of High‐Molecular‐Weight DNA from Mammalian Cells. European Journal of Biochemistry, 36(1), 32–38. https://doi.org/10.1111/j.1432-1033.1973.tb02881.x

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