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The outer membrane (OM) vitamin B 12 receptor, BtuB, is the primary receptor for E group colicin adsorption to Escherichia coli. Cell death by this family of toxins requires the OM porin OmpF but its role remains elusive. We show that OmpF enhances the ability of purified BtuB to protect bacteria against the endonuclease colicin E9, demonstrating either that the two OM proteins form the...
Bacteriocins are proteins produced by bacteria to destroy other bacteria occupying their ecological niche. Photorhabdus luminescens is an insect pathogenic bacterium carried by an entomopathogenic nematode and occupies several different niches in its life cycle. The nematode enters the insect and releases a single strain of P. luminescens. The bacteria then kill the host and the bacteria and nematodes...
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