Standard Residues: Difference between revisions
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Standard residues (standard amino acids and nucleotides) are defined in the [http://www.wwpdb.org/docs.html Protein Data Bank file format (PDB format)] (which was updated on August 1, 2007), and have record type ATOM in PDB-format atomic coordinate files. Standard residues are: | ''Standard residues'' (standard amino acids and nucleotides) are defined in the [http://www.wwpdb.org/docs.html Protein Data Bank file format (PDB format)] (which was updated on August 1, 2007), and have record type ATOM in PDB-format atomic coordinate files. Standard residues are: | ||
* The 20 standard amino acids, plus ambiguous residue codes ASX, GLX, and undetermined UNK. | |||
* Six standard nucleotides A, C, G, I, T, U plus UNK. (The PDB file format residue codes make no distinction between ribo- and deoxyribonucleotides.) | |||
Note: the distinction between ribonucleotides (A, C, G, T, U) and deoxyribonucleotides (DA, DC, DG, DT, DU) was first made when the PDB was remediated, effective August 1, 2007. | |||
