NOC is a software application designed for protein structure visualizing and analysis, for crystallographic modelling and mapping, for Gromacs/Amber MD trajectories viewing and analysis.

NOC is an open source project and is distributed with precompiled binaries for MS Windows, MacOSX, Linux/Unix.

Here are some key features of "NOC ":

· Structure factor calculation and R factor validation
· Fast fourier transformation for electron density synthesis
· Reflection data analysis
· Auto-fit residues' side-chain against density data
· Customize molecular electronic density map contouring
· Easy to add/delete HOH, heteroatom Group, residue
· Real 3D Stereo Visualizing Support (need a Quad Buffer Graphic Adapter and a Stereo Glasses)
· Easy to make a animate stream of molecular model
· Solid surface creating and electrostatic potential calculation
· WYSIWYG Labeling method
· Easy to compare similar structures
· Auto structure checking and hydrogen atoms adding
· Predict possible motifs (sites) in the molecule
· Auto-determinate secondary structures
· Build related molecules and contacts according to molecular crystallographic symmetries
· Calculate molecular accessible surface, embedded surface, residue ccessibility
· Details of Heteroatom interactions in the molecule
· Details of Hydrogen bonds in the molecule
· Structure validation and quantify structure on the fly
· More precise ribbon model representation
· Novel Cartoon model representation
· Report many useful information both in text and plots for structure analysis
· High quality rendering and many types of output (such as TIFF, PNG, BMP, PS�)