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Literature DB >> 662693

Light scattering measurements supporting helical structures for chromatin in solution.

Abstract

Laser light scattering measurements have been made on a series of polynucleosomes containing from 50 to 150 nucleosomes. Radii of gyration have been determined as a function of polynucleosome length for different ionic strength solutions. The results suggest that at low ionic strength the chromatin adopts a loosely helical structure rather than a random coil. The helix becomes more regular on increasing the ionic strength, the dimension resembling those proposed by Finch and Klug for their solenoid model.

Mesh：

Substances：
Chromatin

Year: 1978 PMID： 662693 PMCID： PMC342105 DOI： 10.1093/nar/5.5.1571

Source DB: PubMed Journal: Nucleic Acids Res ISSN： 0305-1048 Impact factor: 16.971

25 in total

Light scattering measurements supporting helical structures for chromatin in solution.

1. THE STRUCTURE OF NUCLEOHISTONES AND NUCLEOPROTAMINES.

2. Low-angle neutron scattering from chromatin subunit particles.

3. Quasielastic light scattering by biopolymers. Conformation of chromatin multimers.

4. Structure of nucleosome core particles of chromatin.

5. The structure of the chromatin core particle in solution.

6. The sub-structure of nucleosomes.

7. X-ray studies on "native" chromatin.

8. Small angle neutron scattering studies of chromatin subunits in solution.

9. Statistical length of DNA from light scattering.

10. Subunit associations among chromatin particles.

1. Computer simulation of the 30-nanometer chromatin fiber.

2. Chromatin higher-order structure studied by neutron scattering and scanning transmission electron microscopy.

3. Studies on the structure of isolated chromatin in three different solvents.

4. Chromatin fibers are left-handed double helices with diameter and mass per unit length that depend on linker length.

5. The superstructure of chromatin and its condensation mechanism. I. Synchrotron radiation X-ray scattering results.

6. Three-dimensional structure of extended chromatin fibers as revealed by tapping-mode scanning force microscopy.

7. Aggregation of small oligonucleosomal chains into 300-A globular particles.

8. Interparticle effects in low-angle x-ray and neutron diffraction from chromatin.

9. X-ray small-angle scattering study of mononucleosomes and of the close packing of nucleosomes in polynucleosomes.

10. Structure of the chromosomal material in inactive nuclei of chicken red blood cells.