NOC (current version 1.5.2.10) is a free program for protein structure model-building, visualization, validation and analysis ...//nSome features of NOC://n Auto-fit residues' side-chain against density data;//n Solid surface generation and electrostatic potential, hydrophobic force coloring;//n Potentials calculations;//n Customize molecular electronic density map contouring;//n Easy to add/delete HOH, heteroatom Group, residue;//n Real 3D Stereo Visualizing Support (need a Quad Buffer Graphic Adapter and a Stereo Glasses); //n Easy to make a animate stream of molecular model; //n WYSIWYG Labeling method; //n Easy to compare similar structures; //n Auto structure checking and hydrogen atoms adding; //n Predict possible motifs (sites) in the molecule; //n Auto-determinate secondary structures; //n Build related molecules and contacts according to molecular crystallographic symmetries; //n Calculate molecular accessible surface, embedded surface, residue accessibility; //n Details of Heteroatom interactions in the molecule; //n Details of Hydrogen bonds in the molecule; //n Validate structure on the fly; //n More precise ribbon model representation ;//n Novel Cartoon model representation ;//n High quality rendering and many types of output (such as TIFF, PNG, BMP, PS¡­) ;//n//n

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