Research Article
Alteration of Plasma Amino Acid Concentrations in Iranian Children with COVID-19
Table 2
Frequency (%) of amino acid abnormality in COVID-19 patients according to the Laboratory Reference Interval.
| | Analyte | Reference interval (μmol/L) | Low (%) | Normal (%) | High (%) | Analyte | Reference interval (μmol/L) | Low (%) | Normal (%) | High (%) |
| | Alanine | 240-600 | 3 (11.5) | 20 (76.9) | 3 (11.5) | Isoleucine | 30-130 | 11 (42.3) | 15 (57.7) | | | Arginine | 40-160 | 6 (23.1) | 19 (73.1) | 1 (3.8) | Lysine | 80-250 | 5 (19.2) | 15 (57.7) | 6 (23.1) | | Asparagine | 24-60 | 4 (15.4) | 14 (53.8) | 8 (30.8) | Methionine | 6-49 | 1 (3.8) | 21 (80.8) | 4 (15.4) | | Aspartic acid | 0-20 | — | 6 (23.1) | 20 (76.9) | Ornithine | 20-135 | | 19 (73.1) | 7 (26.9) | | Citrulline | 8-47 | 1 (3.8) | 22 (84.6) | 3 (11.5) | Phenylalanine | 30-80 | | 4 (15.4) | 22 (84.6) | | α-Aminobutyric acid | 6-38 | 2 (7.7) | 22 (84.6) | 2 (7.7) | Serine | 60-200 | 1 (3.8) | 14 (53.8) | 11 (42.3) | | Glutamic acid | 10-120 | | 6 (23.1) | 20 (76.9) | Taurine | 19-216 | | 26 (100) | | | Glutamine | 396-746 | 10 (38.5) | 14 (53.8) | 2 (7.7) | Threonine | 40-240 | | 20 (76.9) | 6 (23.1) | | Glycine | 140-490 | 1 (3.8) | 22 (84.6) | 3 (11.5) | Tryptophan | 15-73 | 1 (3.8) | 19 (73.1) | 6 (23.1) | | Histidine | 50-130 | 3 (11.5) | 23 (88.5) | | Tyrosine | 30-120 | 3 (11.5) | 22 (84.6) | 1 (3.8) | | Leucine | 60-230 | 1 (3.8) | 19 (73.1) | 6 (23.1) | Valine | 140-350 | 5 (19.2) | 18 (69.2) | 3 (11.5) |
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