User:Michael Roberts/BIOL115 Chymo: Difference between revisions
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== Beta Barrels, Protein Domains and the Active Center == | == Beta Barrels, Protein Domains and the Active Center == | ||
The chymotrypsin molecule is folded into two <scene name='User:Michael_Roberts/BIOL115_Chymo/2ndry_structure/1'>domains</scene>, each containing six beta strands (orange) arranged as anti-parallel sheets which form a circular structure known as a beta barrel. Rotate the molecule so that you can see down through each of the two beta barrels in turn. | The chymotrypsin molecule is folded into two <scene name='User:Michael_Roberts/BIOL115_Chymo/2ndry_structure/1'>domains</scene>, each containing six beta strands (orange) arranged as anti-parallel sheets which form a circular structure known as a beta barrel. Rotate the molecule so that you can see down through each of the two beta barrels in turn. | ||
''Colour key:'' | ''Colour key:'' | ||
{{Template:ColorKey_Helix}}, | {{Template:ColorKey_Helix}}, | ||
{{Template:ColorKey_Strand}}. | {{Template:ColorKey_Strand}}. | ||
The <scene name='User:Michael_Roberts/BIOL115_Chymo/2ndry_structure/2'>active site residues</scene> (Ser-195, His-57 and Asp-102 shown here in spacefill representation), are far apart in the primary sequence but are brought together in a crevice formed between the two beta barrel protein domains. | |||