Na(+)-Ca2+ exchange in locust striated muscles.

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 Biophys

authors

Juhászová M,Ruscák M,Zachar J,Novotová M

subject

Has Abstract

pub_date

1990-10-01 00:00:00

pages

477-87

issue

5

eissn

0231-5882

issn

1338-4325

journal_volume

9

pub_type

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