Dear All, I have been using limma for data analysis of affymetrix chips. We want to compare result of affymetrix chip and Amersham Codelink. We have done experiment with three knock out mice and compared with the wild type mice. Can you suggest us the best bioconductor packages which can be used to fish out differentially experessed genes with P. values on affymetrix and codelink slides. Help in this regard will be highly appreciated. Binita ============================== Binita Dutta, PhD MicroArray Facility(MAF) UZ Gasthuisberg Onderwijs en Navorsing Herestraat 49 3000 Leuven Belgium