Valine is one of $20$ proteogenic amino acids. Its codons are $GUU,\,GUC,\,GUA$, and $GUG$. Cysteine codons are $UGU$ and $UGC$. With a thiol side chain, cysteine is classified as a hydrophilic amino acid. Alanine codons are $GCU,\,GCC,\,GCA$, and $GCG$. It is classified as a non-polar amino acid. $L-$ alanine is second only to leucine. Lysine codons are $AAA$ and $AAG$. Lysine is a base, as are arginine and histidine.