Asymmetric Unit: Difference between revisions

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* <scene name='Asymmetric_Unit/Unit_cell/5'>Unit Cell</scene>. In the case of [[2qcb]], the unit cell contains portions of 16 copies of the asymmetric unit.

The '''asymmetric unit''' is the smallest portion of a crystal that~~, when~~ duplicated and moved by crystal symmetry operations, can ~~produce~~ the unit cell of the crystal. The symmetry operations that are common for biological molecules are rotation, translation, and screw operations (which combine rotation and translation). Mirror symmetry planes occur rarely in crystals of biological molecules due to the presence of chiral centers, e.g. L or D amino acids.

The '''asymmetric unit''' is the smallest portion of a crystal that provides a complete solution. When duplicated and moved by crystal symmetry operations, the unit cell of the crystal can be generated, and from the unit cell, large portions of the crystal. The symmetry operations that are common for biological molecules are rotation, translation, and screw operations (which combine rotation and translation). Mirror symmetry planes occur rarely in crystals of biological molecules due to the presence of chiral centers, e.g. L or D amino acids.

The '''[[Biological Unit|biological unit]]''' is defined elsewhere.

Asymmetric Unit: Difference between revisions

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 * <scene name='Asymmetric_Unit/Unit_cell/5'>Unit Cell</scene>. In the case of [[2qcb]], the unit cell contains portions of 16 copies of the asymmetric unit. <!--<font color="red">Sorry, still not working. See instructions below.</font>-->
-The '''asymmetric unit''' is the smallest portion of a crystal that, when duplicated and moved by crystal symmetry operations, can produce the unit cell of the crystal. The symmetry operations that are common for biological molecules are rotation, translation, and screw operations (which combine rotation and translation). Mirror symmetry planes occur rarely in crystals of biological molecules due to the presence of chiral centers, e.g. L or D amino acids.
+The '''asymmetric unit''' is the smallest portion of a crystal that provides a complete solution. When duplicated and moved by crystal symmetry operations, the unit cell of the crystal can be generated, and from the unit cell, large portions of the crystal. The symmetry operations that are common for biological molecules are rotation, translation, and screw operations (which combine rotation and translation). Mirror symmetry planes occur rarely in crystals of biological molecules due to the presence of chiral centers, e.g. L or D amino acids.
 The '''[[Biological Unit|biological unit]]''' is defined elsewhere.