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 Lettjournal_title
FEBS lettersauthors
Schultz JE,Grünemund R,von Hirschhausen R,Schönefeld Udoi
10.1016/0014-5793(84)80843-1subject
Has Abstractpub_date
1984-02-13 00:00:00pages
113-6issue
1eissn
0014-5793issn
1873-3468pii
0014-5793(84)80843-1journal_volume
167pub_type
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