Table 3. 20S proteasome, cathepsin pH 2.5, pH 5.5 and calpain activity in white muscle (WM), red muscle (RM), liver, heart and gill of fed and fasted Arctic charr.
Activities are expressed in fluorescent units per mg protein per minute (means ± s.e.m., n = 7). *Indicates a significant difference between fed and fasted groups.
| 20S proteasome | Cathepsin pH 2.5 | Cathepsin pH 5.5 | Calpain | |||||
|---|---|---|---|---|---|---|---|---|
| Tissue | Fed | Fasted | Fed | Fasted | Fed | Fasted | Fed | Fasted |
| WM | 0.46 ± 0.02 | 0.46 ± 0.03 | 1.63 ± 0.11 | 2.20 ± 0.45 | 6.24 ± 0.37 | 7.88 ± 1.57 | 2.64 ± 0.25 | 3.11 ± 0.56 |
| RM | 3.62 ± 0.23 | 2.93 ± 0.47 | 3.87 ± 0.60 | 4.99 ± 1.15 | 13.04 ± 1.38 | 17.98 ± 4.18 | 8.76 ± 2.16 | 10.40 ± 3.25 |
| Liver | 10.61 ± 0.94 ** | 14.03 ± 1.10 ** | 2.33 ± 0.20 | 2.98 ± 0.19 | 5.31 ± 0.40 | 4.14 ± 0.28 | n.d. | n.d. |
| Heart | 5.98 ± 0.33 | 3.53 ± 0.45 | 6.45 ± 0.15 | 6.79 ± 0.20 | 8.36 ± 1.22 | 8.47 ± 0.65 | n.d. | n.d. |
| Gill | 12.43 ± 0.79 | 11.71 ± 1.00 | 5.01 ± 0.47 | 5.45 ± 0.46 | 9.82 ± 1.77 | 9.31 ± 0.99 | n.d. | n.d. |
n.d. not determined
** Indicates a significant difference betweem fed and fasted fish;