Note: If you are using Excel to edit GenePattern files, be sure to save the file as a tab-delimited text file and supply the correct file extension. You can specify the file name in quotes to prevent Excel from appending .txt to the file name. Also, note that Excel's auto-formatting can introduce errors in gene names, as described in Zeeberg, et al (2004).
MAGE-TAB and MAGE-ML File Formats
The MAGE-TAB and MAGE-ML file formats are defined by the Functional Genomics Data Society (FGED, formerly MGED) to create standards for the representation of microarray expression data to facilitate the exchange of microarray information between different data systems. More information about and sample files in the FGED-based formats are available here.