| Catalase (pkat/mg protein) | Superoxide Dismutase (mU/µg protein) |
---|
Rat islets | 122 ± 3.2 (4) | 7.3 ± 0.6 (4) |
Mouse islets | 19.4 ± 3.9 (4)a | 3.2 ± 0.5 (4)b |
Human islets | 197 ± 11.6 (5)a | 9.1 ± 1.7 (5) |
- Rat, mouse, and human islets were precultured for 5–8 days in RPMI 1640 containing 11.1 (mouse and rat) or 5.6 mM glucose (human). Groups of 200–300 islets were taken for enzyme activity determination as given in Materials and Methods. Results are given as means ± SEM, with the number of experiments in parentheses. ap < 0.001 and bp < 0.01 when comparing with rat islets using Student’s t test.