Hi everybody:<br><br>What would be proper approach to generate restraints that will keep base pairs coplanar (or nearly coplanar) in RNA/DNA helical structures?  Hydrogen bonds by themselves are not sufficient, at least not for low resolution refinement, &lt;4Å<br>
<br>Jens <br clear="all"><font color="#330099">           <br></font><i><b><font color="#330099">+++++++++++++++++++++++++++++++++++++++++++++++++++++++</font></b></i><div><i><b><font color="#330099"><br></font></b></i></div>
<div><i><b><font color="#330099">Jens J. Birktoft<br>e-mail: <a href="mailto:jens.knold@gmail.com" target="_blank">jens.knold@gmail.com</a><br>slow-mail: Dept. Chemistry, NYU, 350 CPW , Suite 9F, New York, NY 10025<br>Phone: 212-749-5057<br>
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