Higher-order chromatin fibers (200--300 A in diameter) are reproducibly released from
nuclei after lysis in the absence of formalin and/or detergent. Electron microscope analysis …

Metaphase chromosomes released from cells in the presence of Joklik's suspension media
by vortex-mixing with 0.5 mm glass beads have been analyzed by electron microscopy. In …

The morphology of metaphase chromosome-derived chromatin fibers released from cells by
non-ionic detergent cell lysis in the presence of divalent cations has been studied by …

Both intact and nuclease-isolated chromatin fibers have been examined at different degrees
of salt-induced compaction, using a variety of preparation techniques. The results suggest …

Three classes of chicken erythrocyte chromatin particles differing in their content of lysine-
rich histones and/or spacer DNA have been studied in order to determine their ability to …

The effect of selective removal of histone proteins from chicken erythrocyte nuclei on the
process of reversible dispersal of chromatin in low ionic strength was examined in electron …

Previous studies of the structure of metaphase chromosomes have relied heavily on electron
micrography and have revealed the existence of a 10-nm unit fiber that is thought to …

There is considerable current interest in the organisation of nucleosomes in chromatin. A
strong X-ray and neutron semi-meridional diffraction peak at approximately 10 nm had …

The basic chromatin fiber is composed of a tandem array of nucleosomes, adjacement
nucleosomes being separated by a variable amount of DNA. In vivo, this fiber is folden to …

Polynucleosomes from calf brain cortical neurone nuclei have an average repeat length of
less than 168 base pairs. The ability of this material to adopt higher order structure has been …