Michael Pikaart/Biochem StructureIntro: Difference between revisions
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<scene name='Pikaart_Sandbox_1/Helix_closeup/3'>Two helical turns</scene> Zoom in and out a bit and make sure you can distinguish the backbone atoms from the side chains. See if you can tell by inspection what amino acids are present in this bit of helix. The green dashed lines show the i to i+4th residue hydrogen bonds. If you rotate the helix so you can see right down the helical axis, you would be lead to believe that there is quite a bit of space down the middle. To convince yourself that the helix is actually very tightly packed, left-click on the structure, chose "Style," then pick "Scheme," and then "CPK Spacefill." | <scene name='Pikaart_Sandbox_1/Helix_closeup/3'>Two helical turns</scene> Zoom in and out a bit and make sure you can distinguish the backbone atoms from the side chains. See if you can tell by inspection what amino acids are present in this bit of helix. The green dashed lines show the i to i+4th residue hydrogen bonds. If you rotate the helix so you can see right down the helical axis, you would be lead to believe that there is quite a bit of space down the middle. To convince yourself that the helix is actually very tightly packed, left-click on the structure, chose "Style," then pick "Scheme," and then "CPK Spacefill." | ||
<scene name='Pikaart_Sandbox_1/Zipper/1'> | <scene name='Pikaart_Sandbox_1/Zipper/1'>The dimerization interface</scene> This scene shows you the region of the dimerized proteins where they contact each other. The hydrophobic amino acid side chains leucine and valine are shown in green. Note how the amphipathic character of each helix. However, there is one amino acid side chain at the dimer interface which is not hydrophobic - can you tell which it is? | ||