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.
Research Article| September 01 1979
Studies on the high-mobility-group non-histone proteins from hen oviduct
Biochem J (1979) 181 (3): 585–591.
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C S Teng, G K Andrews, C T Teng; Studies on the high-mobility-group non-histone proteins from hen oviduct. Biochem J 1 September 1979; 181 (3): 585–591. doi: https://doi.org/10.1042/bj1810585
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