Biological Unit: Difference between revisions
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Of course, what is the biological unit under one set of conditions may change under a different set of conditions, so there may be more than one biological unit that includes a given protein chain. | Of course, what is the biological unit under one set of conditions may change under a different set of conditions, so there may be more than one biological unit that includes a given protein chain. | ||
Published macromolecular structure data files ([[Atomic | Published macromolecular structure data files ([[Atomic coordinate files]], often in the [[PDB file format]]) contain the [[Asymmetric Unit]], which may be identical with the biological unit, or only a portion of it, or may contain multiple biological units. When publishing a macromolecular structure, the authors may elect to specify the biological unit. In the [[PDB file format]], this is done in REMARK 350. | ||
Atomic coordinates for biological units, when specified by the authors of a published structure, are available from the [[Protein Data Bank]]. When this was written (April, 2008), biological units were available at the bottom of the list under the ''Download Files'' section, under the ''Structure'' tab (upper left of the page). | Atomic coordinates for biological units, when specified by the authors of a published structure, are available from the [[Protein Data Bank]]. When this was written (April, 2008), biological units were available at the bottom of the list under the ''Download Files'' section, under the ''Structure'' tab (upper left of the page). | ||
