Recently, chip-based methods [ 22- 32] (and references [ 26- 29]) such as Affymetrix gene expression arrays have been used for SNP discovery Affymetrix short oligonucleotide arrays are fabricated with sets of eleven 25-mer probes to interrogate the expression level of a particular mRNA.
Comprehensive gene expression profiles of 9 independent healthy donors were generated with high-density oligonucleotide human arrays with 22,283 probe sets, which in total interrogated the expression levels of approximately 18,400 transcripts and variants, including 14,500 well-characterized human genes.
We interrogated the expression levels of TRAIL and its receptors in our pre-existing microarray data sets on the above oral cell lines representing different phenotypes.
Comprehensive gene expression profiles for the three attenuated and the three virulent M. bovis macrophage infections were generated with high-density oligonucleotide bovine arrays (Affymetrix) and 24,072 probe sets, which in total interrogated the expression levels of approximately 23,000 transcripts.
High throughput genomic technologies, by simultaneously interrogating the expression levels of thousands of genes, offers the potential to identify new biomarkers for early detection, prognosis, targets for therapy and for reclassification of prostate tumors.
The majority of probe sets on the ATH1 chip interrogates the expression level of one gene, some match to two or more genes.
Here, the Exon Array PGF was modified by removing a randomly selected probe from each probe set with more than one interrogating probe, and then re-summarizing the expression levels.
Affymetrix® microarray technology (Human Genome U133A gene chip) was used to analyse the expression levels of about 18,400 transcripts interrogated by more than 22,000 probe sets.
The expression levels of the islet tissues were interrogated by Affymetrix GeneChip Human Gene 1.0 ST whole transcript array containing the well annotated genes based on RefSeq and Ensembl database.
In each of these experiments, one gene was knocked out, and the expression levels of the remainder genes in control and knocked-out strains were interrogated for differential expression.
