Ionic regulation of cyclic AMP levels in Paramecium tetraurelia in vivo.

Abstract:

:cAMP levels in Paramecium increased dose dependently after a step increase of [Ca] or [Sr] in the incubation, provided K was present. Two mM Ca or Sr tripled cAMP concentrations within 3 s and induced an increase in forward swimming speed. The increase in cAMP formation was strictly dependent on the Donnan ratio [K]: square root [Ca]. Na, Li, or tetraethylammonium could not replace K. The data provide evidence for regulation of cAMP in Paramecium by the membrane surface charge as determined specifically by the regulation of cAMP in Paramecium by the membrane surface charge as determined specifically by the K: Ca ratio.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Schultz JE,Grünemund R,von Hirschhausen R,Schönefeld U

doi

10.1016/0014-5793(84)80843-1

subject

Has Abstract

pub_date

1984-02-13 00:00:00

pages

113-6

issue

1

eissn

0014-5793

issn

1873-3468

pii

0014-5793(84)80843-1

journal_volume

167

pub_type

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