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. 1979 Sep 1;181(3):585–591. doi: 10.1042/bj1810585

Studies on the high-mobility-group non-histone proteins from hen oviduct.

C S Teng, G K Andrews, C T Teng
PMCID: PMC1161198  PMID: 518542

Abstract

Nuclear high-mobility-group (HMG) proteins were isolated from hen oviduct. These were proteins HMG-1, -2, -3, -14 and -17, which are equivalent to the classification of calf thymus HMG proteins. Hen oviduct proteins HMG-1 and -2 were individually isolated by HCIO4.extraction and CM-Sephadex chromatographic separation. Their mol.wts. were determined as 28 000 and 27 000, respectively. The proteins have a high content of acidic and basic amino acids. The association of proteins HMG-1 and -2 with the genome of hen oviduct nuclei was probed by a limited digestion with nucleases. Hen oviduct nuclei were incubated with deoxyribonuclease I or micrococcal nuclease until 10% of the DNA was digested. The nuclear suspension was centrifuged and the contents of proteins HMG-1 and -2 in the supernatant and sediment fractions were analysed by polyacrylamide-gel electrophoresis. HMG proteins were found to be preferentially released by micrococcal-nuclease digestion rather than by deoxyribonuclease I.

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Selected References

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