Intrinsic low temperature paramagnetism in B-DNA.
We present an experimental study of magnetization in lambda-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, lambda-DNA exhibits paramagnetic behavior below 20 K that is nonlinear in an applied magnetic field whereas, in the A-DNA state, it 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.
Nakamae
S
S
Laboratoire de Matériaux et Phénomène Quantiques (UMR 7162), Université Paris 7-Denis-Diderot, Paris, France.
Cazayous
M
M
Sacuto
A
A
Monod
P
P
Bouchiat
H
H
D003080:Cold Temperature; D004247:DNA / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry; D017711:Nonlinear Dynamics; D011827:Radiation; D014867:Water / Q000737:chemistry
D014867:Water; D004247:DNA