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Introduction to protein structure

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== Ways of representing protein structure ==
== Ways of representing protein structure ==
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Protein structures can be displayed in many different ways. In <scene name='57/575866/Spacefill_segment/1'>spacefilling</scene> models, all of the non-hydrogen atoms are shown as spheres with their van der Waals radii. In the <scene name='57/575866/Ball_and_stick_segment/1'>ball and stick</scene> model, the atoms are shown as smaller balls, connected by sticks; this is further simplified in the <scene name='57/575866/Stick_segment/1'>stick</scene> model, which only shows the bonds between atoms. <scene name='57/575866/Backbone/2'>Backbone</scene> shows only the N-Calpha-C=O repeating unit; the <scene name='57/575866/Cartoon/1'>cartoon</scene> representation shows the secondary structures.
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'''Questions based upon these scenes:'''
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Which of these representations would be best for showing...
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--the secondary structures present in a molecule?
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--Channels, holes, or pockets in a protein?
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--Residues in the active site of an enzyme?
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Explain your answers.
== Secondary Structures ==
== Secondary Structures ==
</StructureSection>
</StructureSection>

Revision as of 04:39, 16 January 2014

Levels of Protein Structure

Structure of Hemoglobin (PDB entry 1A3N)

Drag the structure with the mouse to rotate
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