Cn3D Home Page

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

Below is a relatively simple sample of what Cn3D can do. There are many more examples in the Tutorial, along with instructions to help new users get started!

This example is a curated CD of the WD40 domain, which is a multi-functional 7-fold beta propeller. Cn3D is showing a representative protein structure, the family alignment, and annotation panels with information about annotated features of this protein family. Highlighted in both structure and sequence windows are the conserved residues in a pattern characteristic to this domain.

Download Cn3D 4.1 Now!

New Features in Cn3D 4.1:

Improved sequence alignment algorithms
Automatic VAST alignment import
Taxonomy viewer

New Features in Cn3D 4.0:

Re-written in C++ to improve performance and extendibility
Improved OpenGL rendering speed
New user interface using wxWindows
Complete alignment editing system, along with algorithms for constructing new alignments
Extensive structure and alignment annotation features
Detailed style control
High-resolution image export
Built-in help system

Updated 06/14/04

Credits