Describe the second structural level of organization of proteins. Name it as well.
- Secondary structure (3 dimensional shape of polypeptide)
- Consists of alpha helixes-- helixes formed from hydrogen bonds (BETWEEN THE BACKBONES, not r groups) in the polypeptide.
- As well as beta sheets-- side by side rows or columns of amino acids that are zigzagged (think crinkle cut fries); can be parallel with multiple polypeptides (amino acids parallel to the same aa) or antiparallel where there is only one polypeptide and the amino acids are not parallel to the same kind of aa.