.. title: Cn3D .. slug: cn3d .. date: 2013-03-04 .. tags: 3D Viewer .. link: http://ncbi.nih.gov/Structure/CN3D/cn3d.shtml .. category: Freeware .. type: text freeware .. comments: Cn3D is a visualization tool for biomolecular structures, sequences, and sequence alignments. It can also function as a helper application for web browsers and allows the web browser to show 3-dimensional structures from NCBI's Entrez retrieval service.