Table 3. D- and L-Amino acid content of Ishizuchi-kurocha (μM).
| 2020 | 2021 | |||
|---|---|---|---|---|
| NAC | NBC | NAC | NBC | |
| L-Asp | 122.6 | 121.6 | 161.6 | 166.0 |
| D-Asp | 4.9 | 6.7 | 0.0 | 0.0 |
| d/d+l ratio | 0.04 | 0.05 | 0.00 | 0.00 |
| L-Glu | 51.2 | 186.0 | ||
| D-Glu | 5.7 | 6.4 | ||
| d/d+l ratio | 0.10 | 0.03 | ||
| L-Ser | 25.6 | 34.0 | ||
| L-Gln | 3.3 | 1.8 | 0.0 | 0.0 |
| L-His | 72.6 | 31.1 | 72.3 | 34.2 |
| L-Arg | 12.5 | 83.3 | ||
| L-Ala | 85.2 | 83.6 | 123.6 | 123.1 |
| D-Ala | 39.3 | 28.1 | 67.9 | 35.4 |
| d/d+l ratio | 0.32 | 0.25 | 0.35 | 0.22 |
| L-Tyr | 11.1 | 43.5 | ||
| L-Val | 76.1 | 74.2 | 85.5 | 86.3 |
| L-Met | 0.0 | 0.0 | 14.0 | 14.8 |
| L-Trp | 33.9 | 12.0 | 28.5 | 15.5 |
| L-Phe | 57.5 | 57.7 | 65.6 | 67.9 |
| L-Ile | 42.3 | 44.0 | 47.8 | 51.2 |
| L-Leu | 128.9 | 124.1 | 152.3 | 150.4 |
NAC: N-acetyl-L-cysteine; NBC: N-tert-butyloxycarbonyl-L-cysteine.