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Mask Files

Each GeneChip® expression array listed below features approximately 100 maintenance genes which serve as a tool to normalize and scale your data prior to performing data comparisons.

To facilitate the use of these genes in scaling or normalization, the mask files that identify these maintenance probe sets on each array are available below.

Please see Appendix G of the GeneChip Operating Software Manual for a complete description on how to use mask files in scaling or normalization to selected probe sets.

Note: During the installation procedure, please ensure that the mask files are installed into the Library folder of Affymetrix Microarray Suite (GeneChip\Library) or GeneChip Operating Software (GeneChip\Affy_Data\Library). If you have inadvertently installed the mask files into a different folder, simply copy the files into the Library folder using Windows Explorer.

GCOS Note: GCOS v1.2 systems (Client and Server) require the 1.2.1 udpate to process mask files for Comparison Analysis. Download the update.

HT Rat-Focus Array (zip, 371 KB)
Human Genome Focus Array Normalization Controls (zip, 1 KB)
Human Genome U133 Plus 2.0 Array Normalization Controls (zip, 1 KB)
Human Genome U133A 2.0 Array Normalization Controls (zip, 1 KB)
Human Genome U133A Set Normalization Controls (zip, 1 KB)
Human Genome U133B Set Normalization Controls (zip, 1 KB)
Mouse Expression Set 430A Normalization Controls (zip, 1 KB)
Mouse Expression Set 430B Normalization Controls (zip, 1 KB)
Mouse Genome 430 2.0 Array Normalization Controls (zip, 1 KB)
Mouse Genome 430A 2.0 Array Normalization Controls (zip, 1 KB)
Rat Expression Set 230A Normalization Controls (zip, 1 KB)
Rat Expression Set 230B Normalization Controls (zip, 1 KB)
Rat Genome 230 2.0 Array Normalization Controls (zip, 1 KB)
Vitis vinifera Array (non vinifera / non 3 prime) (zip, 12 KB)
Vitis vinifera Array (non vinifera) (zip, 6 KB)
Yeast Genome 2.0 Array: S. cerevisiae (masks S. pombe probe sets) (zip, 12 KB)
Yeast Genome 2.0 Array: S. pombe (masks S. cervisiae probe sets) (zip, 14 KB)
TECHNICAL SUPPORT
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POPULAR DOWNLOADS
Brochure, The GeneChip® System: An Integrated Solution For Expression and DNA Analysis (pdf, 227 KB)
Brochure, RNA Expression Analysis with the GeneChip® System (pdf, 1.3 MB)
Data Sheet, Human Genome Arrays (pdf, 169 KB)
Manual, Expression Analysis Technical Manual
Manual, Data Analysis Fundamentals (pdf, 723 KB)
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