Construction of Whole Genome Microarrays, and Expression Analysis of Desulfovibrio vulgaris cells in Metal-Reducing Conditions (Uranium and Chromium)
One of the major goals of the project is to construct whole-genome microarrays for Desulfovibrio vulgaris. Previous whole-genome microarrays constructed at ORNL have been PCR-amplimer based, and we wanted to re-evaluate the type of microarrays being built because oligonucleotide probes have several advantages. Microarrays have been generally constructed with two types of probes, PCR-generated probes that typically range in size between 200 and 2000 bp, and oligonucleotide probes with typical size of 20-70 nt. Producing PCR product-based DNA arrays can be a time-consuming procedure that includes PCR primer design, amplification, size verification, product purification, and product quantification. Also, some ORFs are difficult to amplify and thus the construction of comprehensive arrays can be a challenge. Recently, to alleviate some of the problems associated with PCR product-based microarrays, oligonucleotide microarrays that contain probes longer than 40 nt have been evaluated and used for whole genome expression studies. These microarrays should have higher specificity and are easy to construct, and can thus provide an important alternative approach to monitor gene expression. However, due to the smaller probe size, it is expected that the detection sensitivity of oligonucleotide arrays will be lower than PCR product-based probes.
- Research Organization:
- Miami University, Oxford, OH
- Sponsoring Organization:
- USDOE Office of Science (SC)
- OSTI ID:
- 893409
- Report Number(s):
- NABIR-1023312-2005; R&D Project: NABIR 1023312; TRN: US200625%%265
- Country of Publication:
- United States
- Language:
- English
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