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Cn3D is a helper application for your Web browser that allows you to view 3-dimensional structures from NCBI's Entrez retrieval service. Cn3D simultaneously displays structure, sequence, and alignment, and now has powerful annotation and alignment editing features.

Once installed, see the instructions for configuring your browser.

What's New

Version 4.1:
  • Improved sequence alignment algorithms
  • Automatic VAST alignment import
  • Taxonomy viewer


Mac OS X 10.1 or later

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Cn3D User Discussion


Current Version (4.x)


Downloads 2,087
Version Downloads 1,556
License Free
Date 25 Oct 2004
Platform OS X / PPC 32
Price Free
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