How to reduce the viscosity of Nuclear extractions??

Hiranya S. Roychowdhury hroychow at
Mon Feb 7 10:52:08 EST 2000

At 01:14 PM 2/7/00 -0000, G. Dellaire, Ph.D. wrote:
>Does anyone out there have a good method for reducing the viscosity of
>nuclear extracts (mammalian) after high salt extraction?  

The viscosity in your sample (nuclear) is due to chromosomal DNA.
Digest your samples with DNaseI. After the samples are prepared, add DNase
to them (10ug/mL final conc.) and incubate at 37C for 30min. Alternatively,
include DNase in your 'hypotonic' buffer when the nuclei are isolated (if
that is the method you are using.

Dr. Hiranya Sankar Roychowdhury
New Mexico State University
Las Cruces, NM 88003
Ph. (505) 646-5785
hroychow at


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