Temperature value: Difference between revisions
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Often the very ends of chains, or surface loops, may be so disordered as to prevent assigning any atomic positions at all, leading to '''missing residues'''. That is, these residues were present in the crystallized protein, but have no coordinates in the atomic model because their electron densities were too indistinct. | Often the very ends of chains, or surface loops, may be so disordered as to prevent assigning any atomic positions at all, leading to '''missing residues'''. That is, these residues were present in the crystallized protein, but have no coordinates in the atomic model because their electron densities were too indistinct. | ||
[[FirstGlance in Jmol]] (linked beneath the molecule on every [[PDB code]]-titled page in Proteopedia) lists missing residues and marks their positions with eye-catching "empty baskets". | [[FirstGlance in Jmol]] (linked beneath the molecule on every [[PDB code]]-titled page in Proteopedia) lists missing residues and marks their positions with eye-catching "empty baskets". See snapshots at [[Missing residues and incomplete sidechains]]. It is much easier to overlook missing residues, especially at the ends of chains, in other molecular viewers such as PyMOL, ChimeraX, MolStar, and iCn3D (see [[Missing residues and incomplete sidechains|comparision snapshots]]). | ||
The sequence listing for a PDB code offered by [http://pdbe.org/ PDB-Europe] makes it easy to see missing residues: they are highlighted with a gray background. FirstGlance in Jmol has links to these listings under ''Sequences''. | The sequence listing for a PDB code offered by [http://pdbe.org/ PDB-Europe] makes it easy to see missing residues: they are highlighted with a gray background. FirstGlance in Jmol has links to these listings under ''Sequences''. | ||
