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**MD simulations / Re: about "curavture" and "tangent" in dnaMD**

« **on:**November 08, 2017, 12:02:40 pm »

Hi,

As written in tutorial (http://do-x3dna.readthedocs.io/en/latest/notebooks/helical_axis_tutorial.html), axis coordinate is determined using two base-pairs (one base-step) by 3DNA. Therefore, number of helical-axis coordinates is less than one of total number of base-pairs.

Unit of helical-axis is A, therefore, curvature unit is (1/A). Tangents are a list of vectors with same as helical-axis unit.

With regards,

Rajendra

As written in tutorial (http://do-x3dna.readthedocs.io/en/latest/notebooks/helical_axis_tutorial.html), axis coordinate is determined using two base-pairs (one base-step) by 3DNA. Therefore, number of helical-axis coordinates is less than one of total number of base-pairs.

Unit of helical-axis is A, therefore, curvature unit is (1/A). Tangents are a list of vectors with same as helical-axis unit.

With regards,

Rajendra