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Fig. 1. Redistribution of ß-adrenergic receptor immunoanalogue in
isoproterenol-treated Paramecium cells, viewed by confocal
microscopy. (A) Control cells, (B) isoproterenol-treated cells (10 µmol
l1) immunolabeled with antibodies against human
ß2-adrenoreceptor and processed for confocal microscopy as
described in Materials and methods. ß-adrenergic sites undergo
translocation from the cell membrane (A) to the cytoplasmic compartment upon
isoproterenol treatment (B). Bar, 15 µm.