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Chemistry (UNH-Durham) : Tools

Resources for reference and access to information about chemistry and related sciences.

Visualization and Modeling Tools

The National Center for Biotechnology Information (NCBI) has created iCn3D 1.0 ("I see in 3D"), a new WebGL-based viewer for interactive viewing of 3D macromolecular structures and chemicals on the web. Users no longer need to install a separate application to view structures. With iCn3D 1.0, users can:

  • Interactively view 3D structures and corresponding sequence data,
  • Interactively view superpositions of similar structures,
  • Customize the display of a structure and generate a URL that allows you to share the link,
  • And incorporate iCn3D into your own pages.

iCn3D can be accessed from the molecular graphic that appears on the structure summary for any record in the Molecular Modeling Database (MMDB).

The source code for iCn3D is available from GitHub for developers who would like to customize the program and/or contribute code, and for users who would like to run the program on their local computer.

For those who still would like to use Cn3D, the executable program version of the 3D structure viewer, it is still available; you can still access structures in the "Download Structure Data" portlet by selecting "Download: ASN.1(Cn3D)".