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We have used triplet anisotropy decay techniques to study the flexibility of synthetic DNA fragments with different base pair compositions. We have found major differences in the torsional and bending stiffness of poly(dG) . poly(dC), poly(dA) . poly(dT) and poly(dA-dC) . poly(dT-dG). Poly(dG) . poly(dC) has a torsional modulus more than 40 times larger(More)
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