The GeneChip™ Medicago Gene 1.0 ST Arrays enable you to:
• Measure expression, across the entire gene, with higher resolution and accuracy than with classical 3'-biased microarray solutions
• Get accurate and reproducible data by using multiple independent measurements for each transcript

Background
Model and applied research organisms are valuable for comparative genomics research, evolutionary biology, and continue to play a critical role in deciphering the molecular mechanisms underlying human disease, and agricultural crop improvement. The GeneChip Gene 1.0 ST Arrays have been developed for the analysis of a wide range of model and applied research organisms. These organisms are the latest additions to the growing family of Gene Expression Microarrays offering whole-transcript coverage. The GeneChip Gene 1.0 ST Arrays were designed in collaboration with influential researchers, such as Alan Archibald, Head of the Division of Genetics and Genomics at the Roslin Institute (Porcine Array design), Leonard Zon, Director of Stem Cell Research Program, and Yi Zhou, Genomic Core Director of the Stem Cell Research Program at Children's Hospital Boston and Harvard Medical School in Boston (Zebrafish Array design).

Key benefits
• Highest transcript coverage – get confident expression measurements of well-annotated content with up to 26 probes per transcript
• Whole-transcriptome analysis – capture the transcript isoforms you may miss with 3'-biased expression designs
• High data correlation – achieve high inter- and intra-array strip signal correlation (R >0.99)

Proven performance from the industry standard
GeneChip Gene 1.0 ST Arrays offer whole-transcriptome coverage for selected model and applied research organisms. All designs are based on the most recent genomic content and offer the highest probe coverage (up to 26 probes across the full length of the gene). This allows for accurate detection for whole-transcriptome microarray analysis and provides higher resolution and accuracy than other classical 3'-biased microarray solutions on the market. The whole-transcriptome analysis approach enables researchers to detect multiple transcript isoforms, including those that might be missed using a 3'-biased expression design, such as splice variants, non-polyadenylated transcripts, transcripts with alternative polyadenylation sites, and truncated transcripts.

Complete Reagents, Software and Instrumentation Solution for Optimal Array Performance
For convenience and complete support, the Gene 1.0 ST Array is provided as part of a comprehensive solution that includes GeneChip reagents and instrumentation:
• GeneChip WT Sense Target Labeling and Control Reagents. For detailed information on the procedure of the assay and performance information, please refer to the WT Sense Target Labeling Assay Manual
• GeneChip Fluidics Station 450 for complete walk-away array processing to obtain the highest levels of reproducibility
• GeneChip Scanner 3000 7G with the optional Autoloader for array image acquisition

We offer several tools to help you in your data analysis, including GeneChip Expression Console; software, the NetAffx Analysis Center, and the Integrated Genome Browser (IGB).

Expression Console Software is an easy-to-use application that enables probe set summarization as well as preliminary data quality evaluation. A simple workflow enables the user to quickly analyze the data (see figure). The resulting data can be further analyzed using software applications from GeneChip-compatible™ software providers.

The NetAffx Analysis Center, with regularly updated biological and functional annotations of probe sets, is the most comprehensive resource for array annotations and probe sequence information. Flexible query tools and external links allow researchers to drill down into genes and annotations of interest. This resource makes it easy to interpret microarray results and quickly design downstream studies.

Workflow
Researchers can also use IGB to visualize results in a genomic context. Genomic annotations including RefSeq sequences, SNPs and genomic locations from various sources can be viewed alongside microarray gene expression signal data.

The Gene 1.0 ST Array data analysis workflow is similar to the workflow for 3' gene expression analysis, utilizing Expression Console 1.1, third-party GeneChip-compatible software and annotation tools in the NetAffx Analysis Center and IGB.

Content profile
GeneChip Gene 1.0 ST Arrays provide the latest coverage of the transcribed genome. We use a comprehensive collection of information sources to design probes that interrogate up to 26 unique sequences of each transcript. Together these 26 unique 25-mer probes interrogate up to 650 bases per transcript. This high probe coverage across the entire transcript results in superior performance and data confidence as well as the ability to update your experimental data as the understanding of each genome and transcriptome grows.