amino acids - the building blocks of protein

Index

1. What Are Amino Acids?
2. Structure of Amino Acids
3. Essential vs Non-Essential Amino Acids
4. How Amino Acids Form Peptides and Proteins
5. Importance in Biological Systems

1. What Are Amino Acids?

Amino acids are organic compounds that serve as the fundamental building blocks of peptides and proteins. There are 20 standard amino acids commonly used in biological systems, each with unique properties.

2. Structure of Amino Acids

Each amino acid consists of a central carbon atom bonded to an amino group (-NH₂), a carboxyl group (-COOH), a hydrogen atom, and a variable side chain (R group). The R group determines the chemical behaviour of each amino acid.

3. Essential vs Non-Essential Amino Acids

Essential amino acids cannot be synthesised by the body and must be obtained through external sources, while non-essential amino acids can be produced internally. Both types are crucial for maintaining normal biological function.

4. How Amino Acids Form Peptides and Proteins

Amino acids link together through peptide bonds in a condensation reaction, forming chains. Short chains form peptides, while longer chains fold into proteins. The sequence of amino acids determines the structure and function of the final molecule.

5. Importance in Biological Systems

Amino acids play a critical role in nearly every biological process, including enzyme function, tissue repair, and cellular signalling. Their versatility makes them essential to life and central to biochemical research.