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Instability of rat liver chromatin and other nuclear non-histone proteins in alkaline solution.


ABSTRACT: Non-histone proteins from rat liver nuclei and chromatin were shown to be hydrolysed in 0.1M or-1M-NaOH solutions both at 4 degrees and 18 degrees C; 24h in 1M-NaOH at 18 degrees C is sufficient to break down approx. 77% of these proteins to low-molecular-weight peptides. Loss of protein material banding in the region of pH5.5-8.0 has been demonstrated by isoelectric focusing in polyacrylamide gels, and fine high-molecular-weight bands are no longer visible on sodium dodecyl sulphate/polyacrylamide-gel electrophoresis. The results indicate that care must be taken when analysing non-histone-protein fractions to avoid exposure to alkaline pH conditions.

SUBMITTER: Gronow M 

PROVIDER: S-EPMC1163882 | biostudies-other | 1976 Aug

REPOSITORIES: biostudies-other

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