Nucleic Acids Research, 1981, Vol. 9, No. 4 831-839
© 1981
MOLECULAR BIOLOGY |
The characterisation of a 5-S monosome fraction from chromatin of Physarum polycephalum
Department of Biochemistry, University of Oxford South Parks Road, Oxford, OX1 3QU, UK
Received December 15, 1980. A so-called 5-S mononucleosome fraction was isolated from nuclei of Physarum polycephalum by digestion with micrococcal nuclease and subsequent fractionation by gel filtration. This fraction had electrophoretic and sedimentation properties which were similar to DNA of approximately 140 base pairs in length. It is shown that lysis of the nuclei activates a protease which is resistant to phenyl-methyl sulphonyl fluoride, o-phenanthroline and parachloromercuri benzene sulphonate and which subsequently degrades the nucleosomes.