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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.
Class Bivalvia Body in a bilohed mantle enclosed in a two-valved shell; head reduced; mouth with labial palps but no radula; foot wedge-shaped; plate-like gills; sexes separa
What differences would you expect to see among pea seedlings grown for 10 days in total darkness and pea seedlings grown in the light for the similar period of time? The s
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what are the unit for restriction enzyme activity?
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Explain the Bioelectrical impedance Analysis (BIA)? The difficulty of measuring total body water (TBW) by Isotope Dilution Method led to the search of Bioelectrical Impedance A
Q. What is the uncontrolled mitotic procedure that occurs as disease in pluricellular beings called? Uncontrolled mitotic cell division is known as neoplasia. Neoplasia the for
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