Cardiac
- A rapid intrinsic heart rate resetting response with thermal acclimation in rainbow trout, Oncorhynchus mykiss
Summary: Intrinsic heart rate resetting occurs inconsistently with temperature acclimation in rainbow trout; however, it can occur rapidly, within 1 h of warming, without changes in mRNA expression of sinoatrial node proteins.
- Scaling of morphology and ultrastructure of hearts among wild African antelope
Summary: Wild African antelope show proportionality between capillary and mitochondrial investments of the heart, indicating economy of design at the cellular level of the oxygen cascade in an aerobic organ.
- Heart rate dynamics in a marsupial hibernator
Summary: Control and function of the cardiac system in the eastern pygmy possum during deep torpor is indistinguishable from that of a placental hibernator, and its dynamic heart rate range is one of the greatest measured to date at ∼600 beats min−1.
- Myosin isoforms and the mechanochemical cross-bridge cycle
Summary: Mammals express more than 11 different muscle myosin isoforms. Studies of different isoforms and the effect of mutations in these isoforms illustrate how myosin is adapted for specific functions.