DNA Can be modeled as an elastic rod that can be twisted or bent. Suppose a DNA molecule of Length L is bent such that it lies on the arc of a circle…
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DNA Can be modeled as an elastic rod that can be twisted or bent. Suppose a DNA molecule of Length L is bent such that it lies on the arc of a circle of radius R. The reversible work involved in bending DNA without twisting is W=(BL)/(2R^2), where B is the bending force constant. The DNA in a nucleosome particle is about 680 A in length. Nucleosomal DNA is bent around a protein complex called the histone octamer into a circle of radius 55 A. Calculate the reversible work involved in bending the DNA around the histone octamer if the force constant B = 2.00e-28 J m.
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