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8

PDB is a good resource for answering such questions, since it will let you filter results by many additional parameters. To count and extract 3D structures of human proteins: Open Advanced search tab of the PDB website. Select Biology -> Source organism from the menu. Type Homo sapiens (human). You can reduce redundancy by checking Remove Similar ...


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You are making a few assumptions that are likely not valid for all PDB files. For example: Residue indices are not necessarily sequential, nor do they have to start at 1 Not all possible residues have 1-letter code equivalents, there are thousands of possible exotic residues, not only the standard amino acids PDB files are not only used for proteins, but ...


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The PDB file format was specified in the dawn of computing to fit on punch cards. So it has some shortcomings that have led to generations of scientists cursing the fixed-width column format. By now, it has been superseded by an XML-like format: PDBML. Of course XML is less space-efficient than a column layout, so you can see that disk space was not the main ...


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From your comments it doesn't seem like you are adverse to writing some custom scripts so one option would be to take advantage of the NCBI Structure database. You can filter it by organism and then download the results as a text file / XML. If you need access to the raw PDB data you could then download the PDB archive and examine the ones in your filtered ...


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The only paper I found that examined the question is "Structural, Dynamical, and Electronic Transport Properties of Modified DNA Duplexes Containing Size-Expanded Nucleobases". They state The results confirm that the structural and flexibility properties of the canonical DNA are globally little affected by the presence of benzo-fused bases. The most ...


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http://www.turbosquid.com/3d-models/max-human-brain/580672 That one is only 30 which really isn't bad for a model. You will have trouble finding an anatomically correct model for free. I am curious, is the male brain that much different from the female brain? And do you want just the brain or a whole head with the skeleton and other anatomical features? ...



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