Actomyosin ATPase activity in Atlantic hagfish muscles |
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| Authors: | Hans A Dahl Kåre Nicolaysen |
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| Institution: | (1) Department of Anatomy, Dental Faculty, Institute of Neurophysiology, University of Oslo, Oslo, Norway |
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| Abstract: | Summary Incubation for Ca++-activated myosin ATPase reveals three types of muscle fibres in m. parietalis of the Atlantic hagfish (Myxine glutinosa), while m. craniovelaris and m. longitudinalis linguae both contain one type of muscle fibres.The fast twitch white fibres of m. longitudinalis linguae and m. parietalis show relatively high ATPase activity, while the intermediate fibres of m. parietalis show low activity. Despite of being slow non-twitch, the superficial red fibres of m. parietalis and the fibres of m. craniovelaris show an ATPase activity even higher than that of the fast twitch muscle fibres. |
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