Changes in tension generation and ATPase activity in skinned muscle fibres of the carp following temperature acclimation.
Common carp (Cyprinus carpio L.) were acclimated to either 7 degrees C or 23 degrees C for 1-2 months. Skinned fibre preparations were isolated from the white myotomal muscle, and ATPase activity measured during maximal isometric contractions. At 7 degrees C, fibres from the cold acclimated fish were found to generate more force than those from warm acclimated fish (123.1 and 97.2kN m-2 respectively), and more "work" (force X time integral) was obtained for each ATP hydrolysed. ATP turnover per myosin head in fibres from cold-acclimated fish was lower than in fibres from warn-acclimated fish (1.85 and 2.84 ATP S1(-1) s-1).
Altringham
J D
JD
Johnston
I A
IA
D000064:Acclimatization; D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D002347:Carps / Q000502:physiology*; D003530:Cyprinidae / Q000502:physiology*; D007537:Isometric Contraction; D009119:Muscle Contraction; D009132:Muscles / Q000201:enzymology / Q000502:physiology*; D013696:Temperature
D000251:Adenosine Triphosphatases