|Molar mass||103.12 g·mol−1|
|Appearance||white crystalline powder|
|Boiling point||204.4 °C (399.9 °F; 477.5 K)|
|Acidity (pKa)||2.36 (carboxyl), 10.21 (amino)|
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
2-Aminoisobutyric acid, or α-aminoisobutyric acid (AIB) or α-methylalanine or 2-methylalanine, is an amino acid with the structural formula is H2N-C(CH3)2-COOH. It is contained in some antibiotics of fungal origin, e.g. alamethicin and some lantibiotics. It is not one of the proteinogenic amino acids and rather rare in nature (cf. Non-proteinogenic amino acids). α-Aminoisobutyric acid is a strong helix inducer in peptides. Its oligomers form 3-10 helices.