I apologize if this question this question has been asked before but I still need help finding an answer to the following. 

I am looking for a program/web-server that will calculate the superposition of multiple structures (non-protein!)

Thanks

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Jens J. Birktoft
Structural DNA Nanotechnology
Department of Chemistry
New York University
e-mail: jens.knold@gmail.com; Phone: 212-749-5057
very slow-mail: 350 Central Park West, Suite 9F, New York, NY 10025
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