Complex sentence: This primary structure leads to folding of the protein into the secondary structure formed by hydrogen bonding between the carbonyl oxygens and amine hydrogens in the backbone and tertiary structure formed by interactions between residues of the individual amino acids.
Split into simpler sentences: This primary structure leads to folding of the protein into the secondary structure, formed by hydrogen bonding between the carbonyl oxygens and amine hydrogens in the backbone. Further interactions form the protein's tertiary structure, which is formed by interactions between residues of the individual amino acids.