Abstract:
:High Na+ + Ca2+ exchange rates comparable with those reported for crayfish striated muscle, rat heart and rat brain, were observed in locust striated muscle homogenates and membrane preparations. The Na(+)-Ca2+ exchange followed the 1st order kinetics with a Km value of 18 mumol.l-1 for Ca, the pH optimum was at 8, the temperature optimum at 30 degrees C, and the exchange was inhibited in the presence of sodium in the incubation medium, with a KiNa of approx. 25 mmol.l-1. The present results suggest a high Na(+)-Ca2+ exchange in locust striated muscles which operate on the calcium electrogenesis principle.
journal_name
Gen Physiol Biophysjournal_title
General physiology and biophysicsauthors
Juhászová M,Ruscák M,Zachar J,Novotová Msubject
Has Abstractpub_date
1990-10-01 00:00:00pages
477-87issue
5eissn
0231-5882issn
1338-4325journal_volume
9pub_type
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