Alanine
Alanine is a hydrophobic amino acid.
Three letter code: Ala
One letter code: A
It is a non-polar amino acid. It has a side chain of -CH3 making it the second simplest amino acid. It has four codons: GCA, GCC, GCG and GCU.
See single letter amino acid codes
References
1. Berg J., Tymoczko J. and Stryer L (2012) Biochemistry, seventh edition, Basinstoke: W.H.Freeman and Company.