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Microarray analysis using disiloxyl 70mer oligonucleotides
KTH, School of Biotechnology (BIO), Molecular Biotechnology.ORCID iD: 0000-0002-0695-5188
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2008 (English)In: Nucleic Acids Research, ISSN 0305-1048, E-ISSN 1362-4962, Vol. 36, no 4, 1334-1342 p.Article in journal (Refereed) Published
Abstract [en]

DNA microarray technology has evolved dramatically in recent years, and is now a common tool in researchers portfolios. The scope of the technique has expanded from small-scale studies to extensive studies such as classification of disease states. Technical knowledge regarding solid phase microarrays has also increased, and the results acquired today are more reliable than those obtained just a few years ago. Nevertheless, there are various aspects of microarray analysis that could be improved. In this article we show that the proportions of full-length probes used significantly affects the results of global analyses of transcriptomes. In particular, measurements of transcripts in low abundance are more sensitive to truncated probes, which generally increase the degree of cross hybridization and loss of specific signals. In order to improve microarray analysis, we here introduce a disiloxyl purification step, which ensures that all the probes on the microarray are at full length. We demonstrate that when the features on microarrays consist of full-length probes the signal intensity is significantly increased. The overall increase in intensity enables the hybridization stringency to be increased, and thus enhance the robustness of the results.

Place, publisher, year, edition, pages
2008. Vol. 36, no 4, 1334-1342 p.
Keyword [en]
performance liquid-chromatography, chemical synthesis, purification, depurination, arrays
Identifiers
URN: urn:nbn:se:kth:diva-17366DOI: 10.1093/nar/gkm1145ISI: 000253857400032OAI: oai:DiVA.org:kth-17366DiVA: diva2:335410
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Eriksson Karlström, Amelie

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