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Suppression of induced beta-galactosidase synthesis by cysteamine and its reversion by gamma-irradiation in the presence of ascorbate

Näslund, M.; Ehrenberg, L.

International Journal of Radiation Biology and Related Studies in Physics Chemistry and Medicine 34(5): 411-415

1978

ISSN/ISBN: 0020-7616
PMID: 224000
Document Number: 137964
The induced synthesis of beta-galactosidase in E. coli was found to be inhibited by cysteamine. This inhibitory effect of the SH compound was antagonized by the addition of ascorbate followed by gamma-irradiation with relatively low doses. The cAMP level which, it has been suggested, plays a role in the radioprotective action of cysteamine, is stabilized by ascorbate against changes induced by irradiation.

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