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Old 10-22-2011, 09:50 AM   #1
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Default PubMed: A bias-reducing strategy in profiling small RNAs using Solexa.

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A bias-reducing strategy in profiling small RNAs using Solexa.

RNA. 2011 Oct 20;

Authors: Sun G, Wu X, Wang J, Li H, Li X, Gao H, Rossi J, Yen Y

Abstract
Small RNAs (smRNAs) encompass several different classes of short noncoding RNAs. Progress in smRNA research and applications has coincided with the advance of techniques to detect them. Next-generation sequencing technologies are becoming the preferred smRNA profiling method because of their high-throughput capacity and digitized results. In our small RNA profiling study using Solexa, we observed serious biases introduced by the 5' adaptors in small RNA species coverage and abundance; therefore, the results cannot reveal the accurate composition of the small RNAome. We found that the profiling results can be significantly optimized by using an index pool of 64 customized 5' adaptors. This pool of 64 adaptors can be further reduced to four smaller index pools, each containing 16 adaptors, to minimize profiling bias and facilitate multiplexing. It is plausible that this type of bias exists in other deep-sequencing technologies, and adaptor pooling could be an easy work-around solution to reveal the "true" small RNAome.


PMID: 22016383 [PubMed - as supplied by publisher]



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