Table 4.
The effects of short-term (6 day) BA or GH treatment of lambs at 60 or 120 days of age on MyHC isoform protein expression in different muscles
| D60 | D120 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Muscle | Isoform (%) | CO | BA | GH | s.e.d. | P-value | CO | BA | GH | s.e.d. | P-value |
| n | 11 | 10 | 10 | 11 | 10 | 10 | |||||
| Longissimus dorsi | MyHCI | 10.2 | 9.4 | 9.4 | 1.1 | 0.680 | 8.1 | 8.9 | 8.2 | 1.0 | 0.802 |
| MyHCIIA | 33.3 | 29.9 | 35.0 | 1.8 | 0.028 | 31.9 | 30.7 | 33.3 | 1.5 | 0.236 | |
| MyHCIIX/IIB | 56.5 | 60.7 | 55.6 | 2.3 | 0.060 | 60.0 | 60.4 | 58.4 | 1.8 | 0.533 | |
| Supraspinatus | MyHCI | 42.1 | 45.4 | 42.0 | 8.2 | 0.852 | 48.4 | 34.2 | 47.2 | 8.5 | 0.166 |
| MyHCIIA | 20.6 | 19.2 | 22.0 | 2.0 | 0.387 | 20.3 | 18.2 | 17.7 | 1.6 | 0.429 | |
| MyHCIIX/IIB | 37.3 | 35.3 | 36.0 | 6.7 | 0.916 | 31.3 | 47.6 | 35.1 | 7.6 | 0.086 | |
| Semitendinosus | MyHCI | 11.0 | 9.0 | 8.7 | 1.8 | 0.308 | 7.3 | 9.2 | 6.9 | 1.7 | 0.347 |
| MyHCIIA | 26.3 | 26.2 | 29.1 | 1.5 | 0.142 | 25.0 | 24.0 | 24.8 | 2.0 | 0.920 | |
| MyHCIIX/IIB | 62.7 | 64.8 | 62.2 | 2.8 | 0.578 | 67.8 | 66.8 | 68.2 | 3.3 | 0.870 | |
BA=β agonist; GH=growth hormone; MyHC=myosin heavy chain; CO=control.