Figure 4.

Muscle free amino acid levels of Nile tilapia. (A) Total amino acids (TAAs), (B) essential amino acids (EAAs), (C) non-EAAs (NEAAs), (D) umami amino acids (glutamate and aspartate), (E) sweetish amino acids (lysine, threonine, alanine, glycine, proline, and serine), and (F) bitter amino acids (arginine, histidine, isoleucine, leucine, methionine, and valine). Data values are means (n = 3), with their standard deviations (SDs) represented by vertical bars. Bar graphs of the same color, but with different letters are significantly different (p < 0.05).