22. Tertiary structure

Why does the tertiary structure occur?

Coiled or folded chains often coil / fold further into more compact 3D structures

What forms more due to interactions between R group and polypeptide chain?

More bonds form -> disulphide, ionic, covalent hydrophobic and hydrogen bonds

What do the many types of bonds do?

Maintain the shape

Why are more bonds formed?

Interactions between R group and polypeptide chain

How do enzymes relate?

Enzymes have tertiary structure -> bonds maintain active site shape

What is the disulphide bridge? How is it represented?

Sulphur within 2 R groups -> -S-S-

Where is the hydrophobic interaction? How is it represented?

Towards centre of molecule to avoid water, -CH3-CH3-

What is the ionic bond? How is it represented?

It is positively charged R groups together, -O-NH2-

Where is the hydrophilic reaction? How is it represented?

Towards the outside of the molecule, -CH2O-C- with NH3 coming off C