منابع مشابه
Chromatin and nucleosome structure 1 2
Chromatin nucleosomes (mononucleosomes through pentanucleosomes) have been isolated by staphylococcal nuclease digestion of calf thymus nuclei. The peak value ellipticity is the same for all oligomers, 1900 deg cm2, mol"* at 280 nm, 23°C. The dh28Q,/dT vs T show a progressive increase in Tm of the main thermal band (73.5 C, monomer; 79 C, pentamer). Very small amounts of free DNA can be observe...
متن کاملNucleosome shape dictates chromatin fiber structure.
In addition to being the gateway for all access to the eukaryotic genome, chromatin has in recent years been identified as carrying an epigenetic code regulating transcriptional activity. Though much is known about the biochemistry of this code, little is understood regarding the different fiber structures through which the regulation is mediated. Over the last three decades many fiber models h...
متن کاملDistal chromatin structure influences local nucleosome positions and gene expression
The positions of nucleosomes across the genome influence several cellular processes, including gene transcription. However, our understanding of the factors dictating where nucleosomes are located and how this affects gene regulation is still limited. Here, we perform an extensive in vivo study to investigate the influence of the neighboring chromatin structure on local nucleosome positioning a...
متن کاملDNA structure, nucleosome placement and chromatin remodelling: a perspective.
A major question in chromatin biology is to what extent the sequence of DNA directly determines the genetic and chromatin organization of a eukaryotic genome? We consider two aspects to this question: the DNA sequence-specified positioning of nucleosomes and the determination of NDRs (nucleosome-depleted regions) or barriers. We argue that, in budding yeast, while DNA sequence-specified nucleos...
متن کاملChromatin: The nucleosome unwrapped
The structure of the nucleosome core particle has been determined by X-ray crystallography at 2.8 A resolution. The structure has several significant surprises, and provides important new insights into the structure and function of chromatin.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 1976
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/3.8.1839