Chromatin is a network of deoxyribonucleic acid (DNA) and nucleoproteins that constitutes a chromosome. Chromatin can only be found in a cell with a nucleus and is therefore not present in a prokaryotic cell. The DNA within a eukaryotic cell can be as...

Chromatin is a network of deoxyribonucleic acid (DNA) and nucleoproteins that constitutes a chromosome. Chromatin can only be found in a cell with a nucleus, and is therefore not present in a prokaryotic cell. The DNA within a eukaryotic cell can be as...

A darkly staining substance located in the nucleus of the cell that contains the genetic material composed of deoxyribonucleic acid (DNA) attached to a protein...

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FOUNDATIONS Early in the summer of 1991, Valerio Orlando, a postdoc in Renato Paro's lab at the University of Heidelberg, began working on the problem of identifying where proteins bind to chromatin in vivo. Researchers had already figured out how to determine whether...

Paramutation has been studied extensively in maize since R.A. Brink described a heritable alteration of the r locus that defied principles of Mendelian inheritance (Brink, 1956). A recent publication on paramutation in maize now provides convincing evidence that chromatin-level regulation underlies the phenotypic differences...