Plasma Amino Acid Reference Intervals
Analyte | 0−30 d (μmol/L) | 31 d−23 m (μmol/L) | 2 y−15 y (μmol/L) | >15 y (μmol/L) |
|---|---|---|---|---|
Alanine (α-alanine) | 121.0−571.0 | 112.5−500.4 | 155.8−597.3 | 124.8−564.2 |
β-Alanine | 1.6−11.8 | 1.8−9.0 | 1.2−7.8 | 1.1−9.0 |
Alloisoleucine | 0.3−2.0 | 0.3−2.0 | 0.5−2.5 | 0.4−3.2 |
α-Aminoadipic acid | 0.0−2.9 | 0.0−2.6 | 0.0−1.9 | 0.0−2.2 |
γ-Aminobutyric acid (GABA) | 0.0−0.6 | 0.0−0.8 | 0.0−0.4 | 0.0−0.3 |
β-Aminoisobutyric acid | 0.1−9.6 | 0.4−6.4 | 0.3−3.3 | 0.3−4.3 |
α-Amino-N-butyric acid | 4.5−31.6 | 3.9−31.7 | 6.2−33.5 | 5.4−34.5 |
Arginine | 19.4−171.0 | 25.0−140.7 | 32.7−121.6 | 32.0−150.0 |
Argininosuccinic acid | 0.0−3.0 | 0.0−3.0 | 0.0−3.0 | 0.0−3.0 |
Asparagine | 20.2−106.6 | 31.4−100.5 | 31.6−100.5 | 29.5−84.5 |
Aspartic acid | 1.8−32.3 | 1.6−13.4 | 1.1−8.2 | 0.9−7.4 |
Citrulline | 4.7−44.3 | 11.2−48.8 | 12.0−47.3 | 13.7−63.2 |
Cystathionine | 0.1−2.1 | 0.0−0.6 | 0.0−0.2 | 0.0−0.7 |
Cystine | 6.1−38.7 | 5.4−29.4 | 8.8−36.3 | 13.5−60.2 |
Glutamic acid | 38.0−398.9 | 27.0−195.5 | 18.4−142.2 | 18.1−155.9 |
Glutamine | 264.0−835.0 | 280.0−779.0 | 330.0−726.0 | 332.0−754.0 |
Glycine | 145.6−518.9 | 120.0−365.0 | 129.1−429.7 | 132.0−467.0 |
Histidine | 42.9−115.2 | 44.1−106.5 | 49.8−103.8 | 47.2−98.5 |
Homocitrulline | 0.0−7.0 | 0.0−1.3 | 0.0−1.2 | 0.0−1.7 |
Homocystine | 0.0−0.1 | 0.0−0.1 | 0.0−0.1 | 0.0−0.1 |
Hydroxylysine | 0.4−3.0 | 0.3−1.7 | 0.2−1.0 | 0.1−0.8 |
Hydroxyproline | 19.0−115.6 | 9.6−71.4 | 8.6−45.2 | 4.7−35.2 |
Isoleucine | 19.3−127.4 | 25.2−126.4 | 27.7−110.3 | 27.7−112.8 |
Leucine | 44.0−224.5 | 51.1−216.8 | 56.6−193.6 | 54.9−205.0 |
Lysine | 83.2−334.2 | 70.4−279.2 | 82.7−239.5 | 94.0−278.0 |
Methionine | 13.9−68.7 | 11.6−52.0 | 12.5−40.2 | 12.7−41.1 |
Ornithine | 30.5−205.7 | 25.7−131.3 | 27.3−135.6 | 30.5−131.4 |
Phenylalanine | 28.5−108.2 | 30.3−103.3 | 31.9−103.4 | 33.6−101.9 |
Proline | 84.3−417.0 | 79.9−358.3 | 84.5−365.0 | 84.8−352.5 |
Sarcosine | 0.0−4.5 | 0.0−5.4 | 0.0−4.5 | 0.0−4.0 |
Serine | 60.6−236.2 | 65.4−205.6 | 60.1−171.9 | 48.7−145.2 |
Taurine | 28.7−238.4 | 31.1−139.0 | 33.3−126.0 | 29.2−132.3 |
Threonine | 60.7−326.8 | 53.3−262.3 | 55.9−192.6 | 67.8−211.6 |
Tryptophan | 20.0−86.0 | 22.2−95.7 | 23.9−99.3 | 23.5−93.0 |
Tyrosine | 21.4−186.9 | 26.0−140.2 | 32.2−123.2 | 31.1−118.1 |
Valine | 73.5−309.4 | 84.9−345.0 | 110.0−333.9 | 102.6−345.4 |