Role of transmembrane electrical potential on cadmium fixation by a marine pseudomonad.
The role of cellular energy, and mainly that of electrical transmembrane potential, in cadmium fixation by a marine pseudomonad suspended in a mineral medium was investigated by studying the effects of ionophores. Although fixation of cadmium by cells was generally less when respiratory activity was inhibited, it was not affected by a reduction of the transmembrane electrical potential delta psi in mureinoplasts. These observations strongly suggest that cadmium fixation in this isolate was not the result of a delta psi-dependent active transport.
Flatau
G N
GN
Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 303 Mer et Santé, Nice, France.
Clément
R L
RL
Mahdyoun
F
F
Leblanc
G
G
Gauthier
M J
MJ
D000970:Antineoplastic Agents / Q000493:pharmacokinetics; D001693:Biological Transport, Active / Q000187:drug effects; D002104:Cadmium / Q000493:pharmacokinetics*; D066298:In Vitro Techniques; D007476:Ionophores / Q000493:pharmacokinetics; D008564:Membrane Potentials / Q000187:drug effects*; D009861:Onium Compounds / Q000493:pharmacokinetics; D009943:Organophosphorus Compounds / Q000493:pharmacokinetics; D010101:Oxygen Consumption / Q000187:drug effects; D011548:Pseudomonadaceae / Q000378:metabolism / Q000502:physiology*; D014634:Valinomycin / Q000493:pharmacokinetics
D000970:Antineoplastic Agents; D007476:Ionophores; D009861:Onium Compounds; D009943:Organophosphorus Compounds; D002104:Cadmium; D014634:Valinomycin; C013289:tetraphenylphosphonium