And what that means is for the majority of the proteins that contain the alpha helix, it will be the right handed helix and not the left handed helix that will exist within that protein. So the right handed alpha helix predominates because there is less steric hindrance between the side chains on our alpha helix. Now, the final thing I'd like to mention about the alpha helix is the actual hydrogen bonding that exists between our amino groups. So let's suppose that this is our amino acid that we're actually examining. So this is our amino acid, and this green bond is the peptide bond that does not rotate, that connects this amino acid to the next amino acid. Then we have this peptide bond that connects to this amino acid and so forth.