As microarray probe density continues to increase, a 2% probe failure rate represents a substantial cost in data loss.
Low microarray probe density around the deletion breakpoint made it unclear whether the GATA4 3'UTR was included in the deletion.
The utility of this design has been demonstrated with our first-generation arrays [ 11], but rapid developments in the depth of cotton EST resources, EST assembly quality, and microarray probe density enabled us to create a second-generation platform, which was used in this study.
There are many aspects that have to be taken into consideration in order to achieve high quality data when designing microarrays; including probe density, probe-length, melting temperature, probe placement, strand coverage, cross-hybridization/probe-sequence complexity, probe uniqueness and control probes.
Next, we confirmed the duplication event in one individual (IRL_101) using an Agilent custom designed comparative genomic hybridization (CGH) microarray with high probe density in the PAK7 region.
Using an Agilent custom designed CGH microarray with high probe density in the PAK7 region, we confirmed the duplication event in one individual and the breakpoints identified by CGH (chr20 9,684,902 9,833,151) map closely to those predicted by the SNP array analyses (chr20 9,685,413 9,831,947; Supplementary Material, Fig. S4).
DNA immobilization for the manufacturing of microarrays requires sufficient probe density, low unspecific binding and high interaction efficiency with complementary strands that are detected from solutions.
A targeted chromosomal microarray designed with increased probe density in regions of interest was used for the detection of gross deletions and duplications for each sample (Aglient, Santa Clara, CA).
In addition, mismatch probes produced false cis-eQTL that could not be completely removed with the current strains genotypes and low probe density microarrays.
We empirically demonstrate how, using the same ChIP library, sequencing enables the identification of a larger set of enriched regions, including regions with low density of microarray probe coverage due to the narrowness of the region of enrichment or the presence of repetitive elements that prevent unique oligonucleotides from being placed on the microarray.
High-density oligonucleotide microarray probe mapping information was provided by Ensembl except in the case of Saccharomyces cerevisiae and A. thaliana where high gene density causes erroneous mapping output in Ensembl.
