Words similar to buchnera
Example sentences for: buchnera
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This is indicated by an X-pattern when the positions in the two genomes are plotted against one another with the origins of replication as endpoints (the replication origin in Buchnera was designated by Shigenobu et al.
Only two of the 560 protein-coding genes that show clear orthology between E. coli and Buchnera would have been removed (due to absence from both Vibrio cholerae and Yersinia pestis ). The two genes ( dnaC and dnaT ) are linked in both Buchnera and E. coli and were retained in the ancestor.
The Buchnera endosymbiont of the aphid Acyrthosiphon pisum has a genome of 643 kb [ 8], only one-seventh the size of the genome of E. coli MG1655 (4.
Especially in the case of Buchnera, which possesses 50-200 chromosomes per cell [ 30] and in which nonfunctional pseudogenes can persist for long periods [ 31], selection for reduced DNA content seems an untenable explanation for its small genome.
There is no experimental evidence to eliminate the possibility that the degraded promoters in Buchnera are still functional, or that the symbiont uses different promoters from those identified in E. coli.