Michael Pikaart/Biochem StructureIntro: Difference between revisions
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== Alpha helix == | == Alpha helix == | ||
Helix or screw structures are found in lots of contexts, both in nature and in man-made objects. | Helix or screw structures are found in lots of contexts, both in nature and in man-made objects like these: | ||
[[Image:GardenSnail.jpg|200px]] | |||
[[Image:041106024 twiners xlg.jpg|200px]] | |||
[[Image:Screw.jpg|200px]] | |||
[[Image:1.1156091400.the-famous-spiral-staircase.jpg|200px]] | |||
Helices have a twist to them, either right handed or left handed. A normal right-tighty screw is a right-handed helix. We take a look at a protein called GCN4, a transcription factor found in yeast that binds DNA and regulates expression of genes responsible for synthesis of amino acids. (For more information, go to [http://www.yeastgenome.org/cgi-bin/locus.fpl?locus=GCN4|SGD]) | |||
