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 (no͞o′klē-oid′, nyo͞o′-)
The undefined region of genetic material inside a prokaryotic cell, consisting of aggregated DNA.


(ˈnjuːklɪˌɔɪd) biology
(Biology) the region of a prokaryotic cell where the cell's genetic component (nucleic acids) is located
(Biology) resembling a nucleus


(ˈnu kliˌɔɪd, ˈnyu-)
1. the central region in a prokaryotic cell, as a bacterium, that contains the chromosomes and that has no surrounding membrane.
2. resembling a nucleus.
References in periodicals archive ?
aureus Xen29 (Caliper LifeSciences Bioware[TM]) because it is a human-isolated strain modified to integrate a single copy of the Photorhabdus luminescens luxABCDE operon on the bacterial chromosome, which allowed us to measure real-time luminescence.
Only the insertion sequence remains in the bacterial chromosome. This integrated construct was named WPag201-SW.
Papers describe the latest work in areas such as collagen secretion pathways, bacterial chromosome organization, ion channels in development and cancer, and genetics of gonadal stem cell removal.
Time for a fresh look at the bacterial chromosome. Trends Microbiol.
Prevalence of Westerntype cagA 3' variable region was significantly higher in MTZ resistant (33.73% 28/83) than those of MTZsensitive strains (17.28% 14/81) (p=0.02).Conclusion: A high prevalence of MTZ resistance was found in the region and bacterial chromosome mutations in the rdxA and frxA gene still contribute to the high-level MTZ resistance.
The BGI researchers found that the Shiga-toxin-encoding genes, responsible for most of the pathogenicity of the disease, were likely encoded by a viral prophage that integrated in the bacterial chromosome.
XerC and XerD normally serve to resolve circular bacterial chromosome dimers generated by RecA mediated homologous recombination by adding a crossover at a specific 28 bp site dif on the chromosome (16).
Other technologies rely on either integrating the synthetic gene(s) into the bacterial chromosome or using antibiotics and antibiotic resistance genes to amplify plasmids containing the new genes.
They added yeast DNA, including a centromere, and then inserted this doctored bacterial chromosome into yeast, in which it replicated and was also susceptible to further engineering.
The pilus (type IV) genes responsible for these processes are all located in the bacterial chromosome and DNA sequencing revealed the presence of three open reading frames designated pilB, pilC, and pilD that encode proteins of 62, 38 and 32 KDa, respectively [18].