The intracellular distribution of heat-labile enterotoxin in a human isolate of enterotoxigenic Escherichia coli varied significantly as a result of changing incubation time, media, and degree of aeration. Direct comparison with a K-12 plasmid recipient revealed a similar but less dramatic response to environmental factors.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC262174PMC
http://dx.doi.org/10.1128/iai.50.1.317-319.1985DOI Listing

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