Affymetrix GeneChip® System for Gene Expression Analysis
The Affymetrix GeneChip system is a commercial microarray platform that allows whole genome gene expression analysis for a wide variety of experimental organisms (http://www.affymetrix.com/products/arrays/index.affx). This system has three major advantages over other array systems: it is easy to get rapid results; it has the capability to monitor the expression of every gene in the genome; and it is the most widely used commercial microarray platform.
Getting started with Affymetrix GeneChips is easy:
- Set-up an appointment with members of the Microarray Resource to discuss your experiment. This is optional, but highly recommended.
- Give us total RNA (See our recommendations). Standard processing is available starting with as little as 50 ng of total RNA. Exon arrays require 1 µg of total RNA.
- Wait for us to process your samples
- Standard analysis is included, or work with Microarray Resource to further analyze data
The GeneChip® miRNA Array is a powerful and cost effective tool for studying the role of microRNAs (miRNAs). The array provides comprehensive miRNA coverage (Sanger miRNA database V11 content and additional human small nuclear RNAs (snoRNAs and scaRNAs)) with multiple organisms (Human, mouse, rat, canine, and monkey) on a single array. Input amounts: 0.1 – 3µg of total RNA or low molecular weight RNA enriched from 0.1-3 ug of total RNA (for new users we recommend to start with 1 ug of total RNA or LMW RNA enriched from 1 ug of total RNA).
The Affymetrix GeneChip Gene 1.0 ST Array System represents a new generation of array products and offers a number of important advantages: it is more cost-effective for gene expression profiling, and measures expression using probes that span the full length of the transcript (unlike previous Affymetrix arrays that used probes targeted to the 3’ end of the transcript).
Affymetrix GeneChip® System for Exon-level Gene Expression Analysis
The Affymetrix GeneChip Exon Array system provides, for the first time, exon-level expression profiling of the whole-genome on a single array. The arrays contain probes for over 1 million exon clusters within regions of the genome known or predicted to be transcribed. This new generation of GeneChip allows investigation of the expression of individual exons to analyze alternative splicing. Exon Array GeneChips are available for human, mouse, and rat.
Affymetrix GeneChip® System for Genotyping
The Affymetrix GeneChip system is a commercial microarray platform that allows high-throughput genotyping for human samples with as little as 250 ng of genomic DNA. The new Affymetrix® Genome-Wide Human SNP Array 6.0 contains more than 906,600 single nucleotide polymorphisms (SNPs) and more than 946,000 probes for the detection of copy number variation. The SNP Array 6.0 drives genetics forward by enabling a new study paradigm for researchers—a whole-genome approach to replication. This new approach increases the overall statistical genetic power to detect associations and eliminates other disadvantages tied to selecting a limited subset of markers in the replication phase.
Affymetrix GeneChip CustomSeq Resequencing Arrays provides flexible custom arrays that are capable of determining up to 300 kb of unique, high-quality, double-stranded sequence. Flexible array formats of 50kb, 100kb, or 300kb are available. Sequences may cover a single contiguous region or multiple dispersed fragments, facilitating the analysis of whole genomes, multiple genes, and/or multiple organisms on a single array.
A Human Mitochondrial Resequencing array is available as a catalog product. The array interrogates the entire 16 kb of the mitochondrial genome.
The Affymetrix GeneChip Tiling Array Sets contain probes that cover virtually every base pair of the genome and are designed for identifying novel transcripts, mapping sites of protein/DNA interaction in chromatin immunoprecipitation (ChIP) experiments, and other experiments. Probes are tiled at 5-35 base pair resolution, depending on the organism, as measured from the central position of adjacent 25-mer oligos. Array sets are available for a variety of organisms in several different configurations. The probes for interrogating each chromosome are contained on a single array from the whole genome array set and each array is available separately.
Affymetrix GeneChip™ Legacy Arrays
Previous generations of all Affymetrix GeneChips are available for users seeking to add new data to existing gene-expression datasets. Please contact us for pricing.
Please contact the Microarray Resource for more information and to discuss all projects involving Affymetrix GeneChip exon, genotyping, resequencing, or tiling arrays.