Answer:
hydrogen bonds
Explanation:
Proteins are folded into their secondary structure via hydrogen bonds-between the amino hydrogen and carboxyl oxygen atoms. Secondary structure is an intermediate, before proteins gets its 3D shape (conformation), tertiary and quaternary structure. Mos commonly found secondary structures of the protein are:
- alpha helices-backbone N−H group forms a hydrogen bond with the backbone C=O group of the amino acidwhich is three or four residues apart
- beta sheets- laterally connected polypetpide chains with two or three hydrogen bonds
