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Bacteriovorax stolpii
''Bacteriovorax stolpii'' is a species of bacterium in the family Bacteriovoracaceae. It is a predator that feeds on larger Gram-negative bacteria. These prey bacteria tend to live in enteric environments and have similar lipopolysaccharide structures.〔 ''Bacteriovorax stolpii'' recognizes its prey by outer membrane protein receptors, which explains why Gram-positive bacteria that lack outer membranes do not serve as prey.〔 They prey on bacteria by invading the interperiplasmic space where they feed, grow, and reproduce.〔 ''Bacteriovorax stolpii'' used to be classified in the genus ''Bdellovibrio'' because of similar morphologies and lifestyle characteristics, however they were recognized as a new genus through phylogenetic analysis.〔
==Characteristics==
''Bacteriovorax'' and ''Bdellovibrio'' genera share numerous morphological and lifestyle characteristics.〔 ''Bacteriovorax'' and similar genera are recognized by their presence of sphingolipids, which are not widely distributed in prokaryotes.〔 ''Bacteriovorax stolpii'' is known for the presence of sphinophosphonolipids in its membranes.〔 The genome size of the ''Bacteriovorax'' genus has been noted from 2.0–2.6 Mb.〔 ''Bacteriovorax'' is only predatory to Gram-negative bacteria, though they have been found in the gut of humans.〔 ''Bacteriovorax'' and ''Bdellovibrio'' are approximately 0.2-0.4 x 0.5-1.4 μm, are aerobic, with oxygen as a terminal electron acceptor, and are mesophilic.〔 They display a typical Gram-negative morphology and are motile by a single, polar, sheathed flagellum.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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