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. 2022 May 25;9:897028. doi: 10.3389/fnut.2022.897028

TABLE 1.

Enzymatic activity (mU) of porcine diamine oxidase (DAO) (mean ± SD) on different amino substrates.

Substrates
 DAO activity (mU)
Common name Chemical name Chemical structure
Histamine 2-(1H-imidazol-4-yl) ethanamine graphic file with name fnut-09-897028-i001.jpg 28.16 ± 1.00a
Putrescine Butane-1,4-diamine graphic file with name fnut-09-897028-i002.jpg 14.11 ± 0.99b
Cadaverine Pentane-1,5-diamine
 graphic file with name fnut-09-897028-i003.jpg 16.20 ± 1.20b
Tyramine
 4-(2-Aminoethyl) phenol
 graphic file with name fnut-09-897028-i004.jpg 1.77 ± 0.61c
Spermidine N1-(3-Aminopropyl) butane-1,4-diamine graphic file with name fnut-09-897028-i005.jpg 0.65 ± 0.24c
Spermine N1,N4-Bis (3-aminopropyl) butane-1,4-diamine graphic file with name fnut-09-897028-i006.jpg 0.58 ± 0.10c

Different letters denote statistically significant differences (p < 0.001).