According to the taste characteristics described by Tseng et al.20, amino acids were grouped as monosodium
glutamate-like (MSG-like) (aspartic acid + glutamic acid), sweet (alanine + glycine + serine + threonine), bitter
(arginine + histydine + ileleusine + leusine + methionine + phenylalanine + triptophane + trypsine + valine) and
tasteless (cystidine + lysine + proline). Alterations in the free amino acid composition are well connected with the
flavor alterations during fermentation. These low molecular weight compounds are responsible for the flavor of
soybean and soybean products 20-25. The production of fermented seasonings from soybean and marine products are
based on these dynamic processes24-27.