Summary
It is shown using inside-out membrane vesicles that cattle red cells extrude calcium by means of a calmodulin sensitive Ca-pump whose activity is high in calves and extremely low in adult cows. The deline is not due to loss of calmodulin susceptibility nor to a drop in Ca-affinity.
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Zimmermann, A., Schatzmann, H.J. Calcium transport by red blood cell membranes from young and adult cattle. Experientia 41, 743–745 (1985). https://doi.org/10.1007/BF02012575
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DOI: https://doi.org/10.1007/BF02012575