Table 2.
Comparison of disaccharidase activities and ratio of disaccharidase versus maltase activity between humans and rats
|
Human (n = 5) |
Rats (n = 6) |
Relative activity (human/rat) | |||
|---|---|---|---|---|---|
| Specific activity ± SD | Ratio to maltase ± SD | Specific activity ± SD | Ratio to maltase ± SD | ||
| Maltase | 77.3 ± 20.1a | 100 | 40.4 ± 5.1a | 100 | 1.9 |
| Sucrase | 15.5 ± 6.1b | 20 ± 4 | 4.9 ± 0.9b | 12 ± 3 | 3.1 |
| Palatinase | 4.1 ± 1.5c | 5 ± 1 | 1.5 ± 0.2c | 4 ± 0.3 | 2.7 |
| Trehalase | 2.7 ± 3.1 | 3 ± 3 | 5.1 ± 0.9 | 13 ± 2 | 0.53 |
| Lactase | 1.0 ± 0.5d | 1 ± 0.5 | 1.2 ± 0.5d | 3 ± 0.5 | 0.83 |
Notes:
a–d
Significant difference between same letters (P < 0.05). The specific activities of disaccharidases are expressed as μ moles of substrate hydrolyzed/mg protein/h, at 37°C, pH 6.0. Values are mean ± SD in 5 humans and 6 rats. Whole region of the small intestine of rat was used to determine the activity.
Abbreviation: SD, standard deviation.