Vasopressin (ADH)

Vasopressin, also known as antidiuretic hormone (ADH), is a peptide hormone critical for regulating water [...]

Selenocysteine

Selenocysteine is a rare, non-standard amino acid containing selenium, critical for specific proteins in humans [...]

Pyrrolysine

Pyrrolysine is a rare, non-standard amino acid primarily found in certain archaea and bacteria, where [...]

Hydroxyproline

Hydroxyproline is a non-essential amino acid derivative critical for collagen stability and connective tissue health. [...]

Gamma-aminobutyric acid (GABA)

Gamma-aminobutyric acid (GABA) is a non-protein amino acid that functions as the primary inhibitory neurotransmitter [...]