A model is proposed for the structure of DNA in chromatin sub-units. Each sub-unit is
proposed to contain two turns of an inner coil, with a pitch of about 40and an external …

Many studies have led to the proposal of a subunit structure for chromatin similar to a string
of beads. Each bead is thought to contain 200 base pairs of DNA coiled on the outside of a …

A model for chromatin structure is presented.(a) Each of four histone species, H2A (IIb1 or
f2a2), H2B (IIb2 or f2b), H3 (III or f3) and H4 (IV or f2a1) can form a parallel dimer.(b) These …

A variety of studies (see, eg, this volume) have shown that chromatin consists of nuclease-
resistant subunits (nucleosomes). Electron micrographs of chromatin, formaldehyde-fixed …

Chromatin fragments, prepared by brief digestion with DNase II or micrococcal nuclease,
separated into a family of bands on sucrose gradients. The slowest migrating band with an S …

A new model for the fine structure of the chromatin subunit (or 'nucleosome') is proposed.
The model is based on previous experimental findings 1–14 and on two new suggestions …

Abstract Earlier findings/1–10/bearing on a subunit organization of chromatin were
confirmed and in some points detailed. Besides this, a large-scale isolation of chromatin …

The chromatin core particle consists of 140 base pairs of DNA wrapped around [1, 2] an oct
'americ histone core [3]. It has long been known from circular dichroism studies [4-71 that the …

Chromatin and its major proteins, histones, have been investigated in the last decade by
many scientists including biologists, biochemists, and biophysicists. Extensive reviews on …

The digestion of chromatin in situ with DNase I reveals, after denaturation, a regular series of
single stranded DNA fragments the lengths of which represent multiples of 10 bases. These …