Separation of nucleosomes containing histones H1 and H5
- PMID: 739986
- DOI: 10.1007/BF00777522
Separation of nucleosomes containing histones H1 and H5
Abstract
Hen erythrocyte chromatin was digested with staphylococcal nuclease and fractionated by electrophoresis in polyacrylamide gels. Instead of the three bands described for mouse carcinoma chromatin, four main discrete components (MN1, MN2, MN2E and MN3) were resolved in the mononucleosome fraction of erythrocyte chromatin. MN2 contained all five histones and a DNA fragment of 165--180 base pairs. MN2E comprised four nucleosomal histones plus histone H5 (but not H1) and a DNA fragment of 170--190 base pairs. The relatively nuclease resistant MN3 fraction of erythrocyte nucleosomes contained H1 but no H5 histone. A more accurate analysis of the MN2 fraction in mouse carcinoma nucleosomes revealed some additional microheterogeneity depending on the presence of two different subfractions of H1.
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