Intrinsic Low Temperature Paramagnetism in B-DNA
S. Nakamae, M. Cazayous, A. Sacuto, P. Monod, H. Bouchiat
Abstract
We present experimental study of magnetization in λ-DNA in conjunction with structural measurements. The results show the surprising interplay between the molecular structures and their magnetic property. In the B-DNA state, λ-DNA exhibits paramagnetic behaviour below 20 K that is non-linear in applied magnetic field whereas in the A-DNA state, remains diamagnetic down to 2 K. We propose orbital paramagnetism as the origin of the observed phenomena and discuss its relation to the existence of long range coherent transport in B-DNA at low temperature.
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