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Cell Biol Int Rep. 1984 Dec;8(12):1017-27.

Effect of pronase treatment on step-down and step-up photophobic responses in Euglena gracilis.

Abstract

Pronase-treated cells of Euglena gracilis Z show no discernible ultrastructural effects on the photoreceptor apparatus; however, there are physiological effects on swimming speed and on step-up and step-down photophobic responses, especially the latter. Pronase acts differently on the two photophobic responses: the step-down response is completely inhibited after 2 hr., whereas inhibition of the step-up response occurs in only 50% of the cells even after 24 hr. The effects are fully reversible, with step-up recovery quite rapid and step-down recovery considerably slower.

PMID:
6440713
DOI:
10.1016/0309-1651(84)90089-4
[Indexed for MEDLINE]

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