* Carbon (C): Carbon typically forms four covalent bonds in organic molecules, including proteins.
* Nitrogen (N): Nitrogen typically forms three covalent bonds in proteins.
* Oxygen (O): Oxygen typically forms two covalent bonds in proteins.
* Hydrogen (H): Hydrogen typically forms one covalent bond in proteins.
Important Notes:
* These are general rules, and there can be exceptions depending on the specific molecule and its structure.
* The number of bonds formed by an element can vary depending on its role in the protein structure.
* The specific arrangement of these atoms is what determines the unique shape and function of each protein.