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Caulobacter crescentus
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==Strains== In the laboratory, researchers distinguish between ''C. crescentus'' strain CB15 (the strain originally isolated from a freshwater lake) and NA1000 (the primary experimental strain). In strain NA1000, which was derived from CB15 in the 1970s,<ref>{{cite journal|last=Poindexter|first=JS|journal=Microbiol. Mol. Biol. Rev. |date=Sep 1964|volume=28|issue=3|pages=231–95|pmid= 14220656|pmc=441226|title=Biological Properties and Classification of the Caulobacter Group|doi=10.1128/mmbr.28.3.231-295.1964}}</ref> the stalked and predivisional cells can be physically separated in the laboratory from new swarmer cells, while cell types from strain CB15 cannot be physically separated. The isolated swarmer cells can then be grown as a synchronized cell culture. Detailed study of the molecular development of these cells as they progress through the cell cycle has enabled researchers to understand ''Caulobacter'' cell cycle regulation in great detail. Due to this capacity to be physically synchronized, strain NA1000 has become the predominant experimental ''Caulobacter'' strain throughout the world. Additional phenotypic differences between the two strains have subsequently accumulated due to selective pressures on the NA1000 strain in the laboratory environment. The genetic basis of the phenotypic differences between the two strains results from coding, regulatory, and insertion/deletion polymorphisms at five chromosomal loci.<ref name = "marks10"/> ''C. crescentus'' is synonymous with ''Caulobacter vibrioides''.<ref name=vibrioides>{{cite journal|last=Abraham|first=Wolf-Rainer |author2=Carsten Strömpl |author3=Holger Meyer |author4=Sabine Lindholst |author5=Edward R. B. Moore |author6=Ruprecht Christ |author7=Marc Vancanneyt |author8=B. J. Tindali |author9=Antonio Bennasar |author10=John Smit |author11=Michael Tesar |title=Phylogeny and polyphasic taxonomy of Caulobacter species. Proposal of Maricaulis gen. nov. with Maricaulis maris (Poindexter) comb. nov. as the type species, and emended description of the genera Brevundirnonas and Caulobacter|journal=International Journal of Systematic Bacteriology|year=1999|volume=49|pages=1053–73|doi=10.1099/00207713-49-3-1053|pmid=10425763|issue=3|doi-access=free }}</ref>
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