| alpha helix |
The alpha helix is the most abundant type of secondary structures in proteins. In brief, alpha helices are formed from stretches of consecutive amino acid residues with phi, psi angle pairs which correspond to the bottom left quadrant of the Ramachandran plot. The mean phi,psi angles for alpha helices found in proteins are -62 degrees and -41 degrees respectively. The alpha helix has 3.6 residues per turn, with a hydrogen bond between the CO of residue n and the NH of residue n +4. ...
출처: xray.bmc.uu.se/~kenth/bioinfo/glossary.html
|
|---|---|
| alpha helix |
A spiral shape constituting one form of the secondary structure of proteins, arising from a specific hydrogen-bonding between the NH and C=O of the polypeptide backbone.
출처: www.sbs.utexas.edu/delia/bio212/glossary.htm
|