kids encyclopedia robot

Alanine facts for kids

Kids Encyclopedia Facts
Quick facts for kids
L-Alanin - L-Alanine.svg
IUPAC name Alanine
Other names 2-Aminopropanoic acid
CAS number 338-69-2
PubChem 5950
KEGG C01401
Molecular formula C3H7NO2
Molar mass 89.08 g mol-1
Appearance white powder
Density 1.424 g/cm3
Melting point

258 °C, 531 K, 496 °F

Solubility in water 167.2 g/L (25 °C)
log P -0.68
Acidity (pKa)
  • 2.34 (carboxyl; H2O)
  • 9.87 (amino; H2O)
-50.5·10−6 cm3/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Alanine (abbreviated as Ala or A) is an α-amino acid. It has the chemical formula CH3CH(NH2)COOH.

The L-isomer is one of the 20 amino acids encoded by the genetic code. Its codons are GCU, GCC, GCA, and GCG. It is classified as a non-polar amino acid.

L-Alanine accounts for 7.8% of the primary structure in a sample of 1,150 proteins. Leucine is the only amino acid which is more common.

D-Alanine occurs in bacterial cell walls and in some peptide antibiotics.

Images for kids

kids search engine
Alanine Facts for Kids. Kiddle Encyclopedia.