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Microbead expression arrays

William Wells

Author Affiliations

Genome Biology 2000, 1:spotlight-20000606-01  doi:10.1186/gb-spotlight-20000606-01


The electronic version of this article is the complete one and can be found online at:


Published:6 June 2000

© 2000 BioMed Central Ltd

Research news

Strategies for expression analysis range from exhaustive sequencing (and thus counting) of cDNAs to hybridization arrays. In the June issue of Nature Biotechnology Brenner et al. describe a method that combines the digital precision of the former with the speed and throughput of the latter (Nat. Biotech. 2000, 18:630-634). Brenner et al. attach tagged cDNAs to microbeads and then sequence the overhanging ends of the cDNAs by detecting the hybridization of fluorescently labeled probes. After one overhang is identified, a binding site for a type IIs restriction endonuclease (within the probe) is used to cleave a distant cleavage site (within the cDNA sequence) to expose a new overhang. The coming and going of fluorescent probes is monitored by confocal microscopy of the microbeads, which are immobilized in a flow cell. Hundreds of thousands of mRNAs are identified in a few days, exceeding the throughput per machine of conventional sequencers by over 10-fold.

References

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    PubMed Abstract OpenURL

  2. Quantitative monitoring of gene expression patterns with a complementary DNA microarray.

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    Nature Biotechnology