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. 2021 May 20;100(8):101264. doi: 10.1016/j.psj.2021.101264

Figure 3.

Figure 3

Comparison of myosin heavy-chain (MyHC) based muscle fiber characteristics. (A) Immunohistochemical analysis for four separate muscles using an anti-MyHC antibody in three duck breeds at market age. Scale bars: 100 µm. Red arrows are pointing to examples of fibers showing positive reactivity for fast-myosin staining (type II); blue arrows are pointing to examples of fibers that were nonreactive. Green arrows are pointing to examples of fibers showing positive reactivity for slow-myosin staining (type I); black arrows are pointing to examples of fibers that were non-reactive. (B) Fiber area composition of four separate muscles in three duck breeds at market age. Results are mean values. type I = blue; type II = orange. Abbreviations: EDL, m. extensor digitorum longus; GAS, m. gastrocnemius; PM, m. pectoralis major; SOL, m. soleus.