Activities of enzymes of intermediary metabolism in rectal gland and white muscle from the blue-spotted ribbontail stingray (Taeniura lymma) and rectal gland and red muscle from the brownbanded bamboo shark (Chiloscyllium punctatum)
| . | T. lymma . | . | C. punctatum . | . | ||
|---|---|---|---|---|---|---|
| . | Rectal gland . | White muscle . | Rectal gland . | Red muscle . | ||
| CCO | 25.2±2.5LKHM | 1.10±0.30 (5)KR | 40.4±5.5*,LK | 41.2±7.1LK | ||
| CPT | 0.30±0.03LKHM | ND | 0.49±0.10HM | ND | ||
| COT | 0.053±0.012LK,† | ND | 0.63±0.14*,HM | 0.044±0.013LKR | ||
| HOAD | 1.43±0.05LM | 0.24±0.03LKR | 1.73±0.12*,LKHM | 0.90±0.14LR | ||
| d-β-HBDH | 4.95±0.34KHM | 0.32±0.05LHR | 2.04±0.46*,H | 1.36±0.08 | ||
| PK | 97.9±5.2LKM | 522±17LKHR | 61.1±5.9*,LKM | 221.1±22.3LKHR | ||
| GDH | 3.53±0.30K | 1.32±0.18K | 4.60±0.31*,LK | 5.41±0.34LK | ||
| . | T. lymma . | . | C. punctatum . | . | ||
|---|---|---|---|---|---|---|
| . | Rectal gland . | White muscle . | Rectal gland . | Red muscle . | ||
| CCO | 25.2±2.5LKHM | 1.10±0.30 (5)KR | 40.4±5.5*,LK | 41.2±7.1LK | ||
| CPT | 0.30±0.03LKHM | ND | 0.49±0.10HM | ND | ||
| COT | 0.053±0.012LK,† | ND | 0.63±0.14*,HM | 0.044±0.013LKR | ||
| HOAD | 1.43±0.05LM | 0.24±0.03LKR | 1.73±0.12*,LKHM | 0.90±0.14LR | ||
| d-β-HBDH | 4.95±0.34KHM | 0.32±0.05LHR | 2.04±0.46*,H | 1.36±0.08 | ||
| PK | 97.9±5.2LKM | 522±17LKHR | 61.1±5.9*,LKM | 221.1±22.3LKHR | ||
| GDH | 3.53±0.30K | 1.32±0.18K | 4.60±0.31*,LK | 5.41±0.34LK | ||
Activities were measured at 25°C. ND=not detectable. See List of abbreviations for enzyme names.
Activities are expressed as μmol min-1 g-1 wet mass (mean ± s.e.m., N=6 for T. lymma except where noted in parentheses; N=4 for C. punctatum); *enzyme activity in rectal gland from C. punctatum is significantly different from the activity of the same enzyme in rectal gland from T. lymma(Student's t-test, P<0.05); uppercase letters in superscript indicate significant difference (one-way ANOVA, P<0.05) from the same enzyme activity within species in: Lliver, Kkidney, Hheart, Rrectal gland, Mskeletal muscle (T. lymma) or red muscle (C. punctatum) (data other than for rectal gland, white muscle and red muscle are in Table 1); †COT activity is significantly different from CPT activity within the same tissue (Student's t-test, P<0.05). ND activities were omitted from statistical tests.