![]() ![]() To set up a new file type in Explorer that associates the extension ".cn3" On Windows, this should be done by the installer. You may need to consult your system administrator for help. ![]() If Cn3D 4.3.1 does not launch via the test image, look below for hints on how to set up specific browsers. To test whether your configuration is working after installing Cn3D, click on the image below, which should launch Cn3D 4.3.1 and should show a structure and viewpoint very like what's shown in this image: You will often also be given an option to automatically launch that application in the future. If your browser gives you an option to "open with," point it to the Cn3D application in the folder where you installed Cn3D 4.3.1. (Up to version 4.3, Cn3D used the MIME type chemical/ncbi-asn1-binary.) Many modern browsers will let you choose an application when downloading a file with a new MIME type for the first time. NCBI's web servers send data to Cn3D using the MIME type application/3d. A number of documents, including an electronic book, provide additional details about the Toolkit. For Unix users who would like to take advantage of the program's newer features, Cn3D can be built as part of the NCBI Toolkit, which contains the Cn3D source code and make files (requires wxWidgets). However, an earlier release, Cn3D 4.1 for Unix, is still available. Unfortunately, NCBI can no longer support a Unix version of Cn3D. Once you have installed the program files for your platform, follow the instructions below to set up your browser to launch Cn3D from the NCBI web pages (if not already done by the installer). In order to run Cn3D on MacOS versions OSX 10.15 and up, users need to install a replacement for the X11 windowing system, such as the open-source version of the X.Org X server XQuartz.Note for Gatekeeper-enabled Macs (OSX 10.7.5 and up).To install the free Cn3D macromolecular structure viewing program, select your operating system: Installing the Cn3D 4.3.1 3-D structure viewer ![]()
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