Biology definition: Chromatin is a substance made up of DNA or RNA and proteins, such as histones. It condenses during cell division (mitosis or meiosis) and becomes a chromosome. Chromatins are“unwound” condensed structures whereas chromosomes are highly packaged and more condensed than chroma...
Define chromatin. chromatin synonyms, chromatin pronunciation, chromatin translation, English dictionary definition of chromatin. n. A complex of nucleic acids and proteins, primarily histones, in the cell nucleus that stains readily with basic dyes and
A technically simple examination of an interphasic nucleus reveals the condition of the system of sex chromosomes. The X chromatin is found more or less frequently in women in the nuclei of all tissue cells, for example, in 15–60 percent of the nuclei in the epithelial cells of the oral ...
Chromatin is a type of genetic material composed ofDNAand proteins. It helps to pack the DNA into a small voluminous structure that can be contained within the nucleus. It condenses to form the chromosomes during eukaryotic cell division. Cells are the basic functional units of life. The major...
Definition Chapters and Articles Related Terms Recommended Publications Chapters and Articles You might find these chapters and articles relevant to this topic. You Are What You Eat MeikeWiese,Andrew J.Bannister, inMolecular Metabolism, 2020 1Introduction ...
The classic definition of heterochromatin originated from staining mitotic chromosomes74 and later came to be associated with histone modifications75. We now have a more nuanced understanding of the molecular details, including several types of repressive histone modifications and associated proteins and the...
Definition Chapters and Articles Related Terms Recommended Publications Featured Authors Chapters and Articles You might find these chapters and articles relevant to this topic. Tools for the assessment of epigenetic regulation Lauren A. Eaves, ... Rebecca C. Fry, in Environmental Epigenetics ...
et al. A definition of advanced types of atherosclerotic lesions and a histological classification of atherosclerosis. A report from the Committee on Vascular Lesions of the Council on Arteriosclerosis, American Heart Association. Circulation 92, 1355–1374 (1995). Article CAS PubMed Google Scholar ...
. Inspired by this definition, we introduced the metric Proportion of Weakly Connected cells (PWC). PWC quantifies, for a subgraph V consisting of all the cells of the same true class, the proportion of cells that have fewer connections within V...
This simple definition does not consider the degree of proximity required to be functionally meaningful nor does it speak to the length of the intervening sequence, i.e. the size of the loop. Looped structures have been detected at numerous gene loci in a fashion that juxtaposes important ...