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This paper has been withdrawn by the author due to its main result being included in cond-mat/0403309 by the same author.

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This paper withdrawn since it has been published in an updated version in Biophysical Reviews and Letter Vol. 2, No. 2 (2007) 155-166

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This paper has been withdrawn by the author due to the result being known

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This paper has been withdrawn by the author since the comments have been withdrawn.

This paper has been withdrawn by the author.The formula which was proposed gives only a second order deformation.

This paper has been withdrawn by the author due to an error

This paper has been withdrawn by the author due to a crucial sign error in equation 1.