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. 2017 Oct 13;15(10):311. doi: 10.3390/md15100311

Table 2.

Amino acid profiles of F. spiralis protein hydrolysate fractions (mg amino acids/g of DW FSPH) obtained by ultrafiltration.

Amino Acid (AA) F. spiralis Protein Hydrolysate (FSPH) Fraction
Fr1 < 1 kDa 1 kDa ≤ Fr2 < 3 kDa Fr3 ≥ 3 kDa
Alanine tc tc 25.34 ± 0.13
Glycine tc tc 22.38 ± 0.13
Valine 155.53 ± 2.25 209.37 ± 3.35 236.83 ± 4.65
Threonine 1.22 ± 0.08 1.71 ± 0.03 17.42 ± 0.13
Serine 2.75 ± 0.06 3.18 ± 0.03 19.36 ± 0.16
Leucine 2.24 ± 0.12 2.85 ± 0.05 25.35 ± 0.17
Isoleucine 1.89 ± 0.03 2.84 ± 0.06 32.55 ± 0.43
Proline 1.34 ± 0.05 1.93 ± 0.03 12.47 ± 0.11
Methionine tc tc 20.07 ± 0.31
Aspartic acid 3.63 ± 0.07 4.53 ± 0.10 37.53 ± 0.35
Phenylalanine 1.80 ± 0.02 1.49 ± 0.02 15.13 ± 0.15
Glutamic acid 10.40 ± 0.10 7.01 ± 0.22 46.33 ± 0.42
Lysine 15.48 ± 0.20 7.57 ± 0.11 13.82 ± 0.13
Tyrosine tc tc 38.17 ± 0.21
Arginine tc tc tc
Histidine tc tc tc
Tryptophan ND ND ND
Total AA 196.28 a 242.48 a 562.75 b
AA distribution (%)
Hydrophobic 82.94 a 90.10 a 65.35 b
Hydrophilic 15. 04 a 7.88 b 17.36 a
Neutral 2.02 b 2.02 b 17.29 a
Aromatic 0.92 b 0.61 b 9.47 a
Branched-side chains 81.34 a 88.69 a 52.37 b
Negatively charged 7.15 b 4.76 c 14.90 a
Positively charged 7.89 a 3.12 b 2.46 b

Values are mean ± SD (n = 3). Means with different superscripts letters in the same row differ significantly (p < 0.05). Hydrophobic AA (Ala, Val, Leu, Ile, Pro, Met, Phe). Hydrophilic AA (Asp, Glu, Lys, Arg, His). Neutral AA (Gly, Thr, Ser, Tyr). Aromatic AA (Phe, Tyr). Branched-side chains AA (Val, Leu, Ile). Negatively charged AA (Asp, Glu). Positively charged AA (Lys, Arg, His). Tryptophan is not detected in this methodology. DW, dry weight; ND, not detected; tc, traces.