In this article we will discuss about the structure of chromatin in the light of nucleosome. Preamble: A supercoil model for chromatin structure was originally described by Pardon and Wilkins in 1972. Later studies of Boldwin (1975), Kornberg (1974) and others have shown that such a sub-unit structure of chromatin is not only present in mammalian cells but also found [...]
The upcoming discussion will update you about the differences between Euchromatin and Heterochromatin. Difference # Euchromatin: 1. It is narrower, 10-30 nm in diameter. 2. Euchromatin is lightly stained. 3. It is somewhat diffused. 4. Euchromatin is fibrous. 5. It forms the bulk of chromatin. 6. It contains active genes. 7. Euchromatin takes part in transcription. 8. Euchromatin is affected [...]
The following points highlight the five main classes of chemical compounds in chromatin. The classes are: 1. Nucleic acids 2. Basic proteins or histones (protamines in sperm nuclei of some fishes and birds) 3. Acidic proteins (Non-Histones) 4. Lipoproteins 5. Associated inorganic molecules. Chemical Compounds in Chromatin: Class # 1. Nucleic Acids: The nucleic acids are of two types: (i) [...]