# Introduction

> Master the 20 amino acids — their chemistry, physical properties, and roles in protein structure.

Master the 20 amino acids — their chemistry, physical properties, and roles in protein structure.

## Links

- [Module 1: The Building Blocks](https://proteindesign.academy/module/1)
- [1.1 The Hydrophobic Effect](https://proteindesign.academy/module/1/1)
- [1.2 Electrostatics & Salt Bridges](https://proteindesign.academy/module/1/2)
- [1.3 Size & Shape: The Packing Game](https://proteindesign.academy/module/1/3)
- [1.4 The Special Characters](https://proteindesign.academy/module/1/4)
- [1.5 Aromatic Interactions](https://proteindesign.academy/module/1/5)
- [The Peptide Engineer](https://proteindesign.academy/module/1/capstone)