$$\ce{C5H11NO3S}$$
- Essential Amino Acid
- Important for hair shaft formation
- Sulfur-containing amino acid
- Nonpolar / hydrophobic
- Neutral at physiological pH
- Not aromatic
- No ionizable side chain
- Precursor to cysteine
- Sources: eggs, fish, sesame seeds, Brazil nuts
Genetic Code
AUG
- First amino acid in protein synthesis (start codon)