... Langendorff perfusion. The main findings were that: (1) acclimation to 4°C increases the Ca 2+ sensitivity of force generation, but not maximum force development, (2) this increased calcium sensitivity with cold acclimation occurred in parallel with a decrease in the level of cTnT phosphorylation, and (3...

... no effect upon sea raven and cod heart preparations. This approach further implies that calcium release from sarcoplasmic reticulum is not critical in these species. 29 2 1988 © 1988 by Company of Biologists 1988 calcium sensitivity elasmobranch hearts force-frequency post-rest...