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HumanHap550 Genotyping BeadChip, Illumina Inc.
May 2006
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Illumina Inc. announced that it has introduced two new Sentrix HumanHap Genotyping BeadChips for conducting genome-wide association research. The first product, the HumanHap550 BeadChip, contains over 550,000 SNP (single nucleotide polymorphism) markers on a single microarray and, according to Illumina, provides the most comprehensive genomic coverage of any product currently available. A second product, the HumanHap240S BeadChip, when used in combination with Illumina's existing HumanHap300 BeadChip, enables customers to expand the genomic coverage to the same level provided by the HumanHap550 single-chip solution. HumanHap BeadChips are powered by Illumina's Infinium assay method, which enables Illumina to select SNPs that have the highest per-marker information value, resulting in comprehensive genomic coverage with fewer SNP markers than competing approaches. Each of the new HumanHap550 BeadChips will contain roughly 555,000 markers derived principally from so-called "tagSNPs" identified and validated in both phases of the International HapMap Project, which was completed in October 2005.  TagSNPs deliver high information value to geneticists because they serve as "proxies" for larger groups of SNPs, called haplotypes, which are inherited together. Researchers can analyze human populations comprehensively and efficiently by examining between 250,000 and 500,000 tagSNPs instead of the entire set of roughly 10 million SNPs–opening doors to genome-wide disease association studies now in progress. Sentrix HumanHap BeadChips are the only whole-genome genotyping arrays with tagSNP-centric content. In addition to comprehensive genomic coverage, HumanHap BeadChips offer extremely high data quality, with call rates that routinely exceed 99%, reproducibility and accuracy approaching 100%.
Illumina
www.illumina.com
858.202.4566 

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