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. 2013 Dec 23;8(12):e83008. doi: 10.1371/journal.pone.0083008

Table 8. Content, type of amino acid, retention time (RT), peak area as quantitated by RP-HPLC.

Amino acid Abbreviation Type RT (min) Peak area Content (µg/g)
L-Arginine Arg Non essential 4.033 840667 933.667±10.066
L-Aspartic Acid Asp Non essential 4.492 1477469 1635.667±9.609
L-Glutamic Acid Glu Non essential 6.325 356571 355.667±11.015
L-Serine Ser Non essential 8.508 1352648 948.667±7.371
Glycine Gly Non essential 9.258 2067729 1046.333±11.015
L-Histidine His Essential 10.467 875468 1052.667±12.423
L-Threonine Thr Essential 12.108 1177030 958.333±13.650
L-Alanine Ala Non essential 12.933 1576317 1128.333±15.503
L-Proline Pro Non essential 13.458 1549047 1448.333±10.017
L-2-amino-n-butyric acid Abu Non essential ND ND ND
L-Valine Val Essential 21.242 83423 76.333±7.638
L-Methionine Met Essential 24.667 639545 9485.667±10.017
L-Cystine HCl Cys HCl Non essential 26.400 1573488 1262.667±11.719
L-Cystine Cys Non essential 27.517 419992 369.667±11.930
L-Isoleucine Ile Essential 29.100 116971 133.333±10.599
L-Leucine Leu Essential 29.850 1218013 1051.667±10.693
L-Nor Leucine Nor Leu Non essential 30.175 1929186 1265.333±8.737
L-Tryptophan Trp Essential ND ND ND
L-Phenylalanine Phe Essential 31.767 1006590 1157.333±9.504
L-Ornithine Orn Non essential 32.683 236800 115.333±18.771
L-Lysine Lys Essential 33.567 2260476 1334.333±9.609

ND: Not detectable.