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. 1978 Feb;133(2):661–666. doi: 10.1128/jb.133.2.661-666.1978

Involvement of inner and outer membrane components in the transport of iron and in colicin B action in Escherichia coli.

P Wookey, H Rosenberg
PMCID: PMC222072  PMID: 146699

Abstract

Spheroplasts of Escherichia coli mutants were used to investigate the roles of the inner and outer membranes in the transport of iron. tonA mutants, known to be defective in an outer membrane component of the ferrichrome transport system, regained the ability to transport ferrichrome when converted to spheroplasts. On the other hand, the tonB mutant was unable to transport ferric enterochelin in either whole cells or spheroplasts. This implies that an element of the inner membrane is affected. fep mutants were also unable to transport ferric enterochelin, and fell into two classes, fepA and fepB. Spheroplasts of the former class transported ferric enterochelin, and those of the latter did not. This implies that the fepA mutants are defective in ferric enterochelin transport across the outer membrane, and that fepB mutants probably lack the facility to transport ferric enterochelin across the inner membrane. Colicin B action on fepA mutants was found to differ from that on fepB mutants.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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