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The initial stage of packaging have the binding of the chromosomal DNA to histones. Whole, in chromosomes the ratio of the DNA to histones on a weight basis is around 1:1. There are five main types of histones called as H1, H2A, H2B, H3 and H4. Histones are very basic proteins; about 25 percent of their amino acids are lysine or arginine so histones have a vast number of positively charged amino acid side-chains. These positively charged groups therefore bind to the negatively charged phosphate groups of DNA. Not surprisingly giving their importance in packaging DNA the amino acid series of histones have been highly conserved in evolutio.
Disease and Pathogenesis Disease management is a complex and challenging undertaking. Not only are new pathogens and treatments constantly being discovered by effective
Explain Micafungin sodium Micafungin sodium (Mycamine - Astellas), the second echinocandin antifungal1 to become available in the US, has been approved by the FDA for intraveno
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Actinobacillosis Synonym : Wooden Tongue Causative organism : Actinobacillus lignieresii Species affected : Ruminants, cattle and s
An island may be colonised by just a few individuals, or just a pair:, or even a single gravid female. When a new population develops from these early colonisers of the island, the
Which gas in each of the following pairs would you expect to be more soluble in water? Why? (a) Oxygen and Carbon Dioxide (b) Nitrogen and Ammonia (c) Methane and Hydrogen Sulfide.
Explain Total Parenteral Nutrition OPN) It is a method of providing, complete nutritional support in which the gastrointestinal (GI) tract is bypassed by introducing assimilab
Disease occurrence due to climate change The movement of animal diseases across physical and political boundaries threatens food security and creates a global public co
Q. How mineral salts participate in enzymatic activity? Many mineral salts are cofactors of enzymes that are the substances without which enzymes do not work.
TYPES OF PLASTIDS (1 ) LEUCOPLASTS These are present in ground parts of plants, internal parts of herbaceous stems and deep tissues of plants where sun light is not avail
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