, Amino acid
The 21 amino acids •
found in eukaryotes
grouped according
to their side-chains'
pKas and charge at
physiological pH 7.4
,Amino acids are molecules •
containing an aminegroup,
a carboxylic acid group and
a side-chain that varies
between different amino
acids
The carbon atom next to . •
the carboxyl group is called
the α–carbonand amino
acids with a side-chain
bonded to this carbon are
referred to as alpha amino
acids
, The key elements of •
an amino acid are
carbon ,hydrogen,
nitrogen oxygen, and