Hi, Does anybody know how to obtain KEGG gene-ids for a list of affymetrix probesets. I manage to retrieve probesets or entrez-gene-ids for a given KEGG pathway, but I need to know which probeset represent the individual KEGG gene (eg.: the gene "mmu:108960" is part of pathway "mmu04210", but what is the underlying entrez gene or probeset...) Thanks in advance for any help Manuel Mayhaus University of Milano-Bicocca (+39) 02 6448 3530

On 11/10/05 3:13 AM, "Dr.Mayhaus Manuel" <manuel.mayhaus at="" unimib.it=""> wrote: > Hi, > > Does anybody know how to obtain KEGG gene-ids for a list of affymetrix > probesets. > I manage to retrieve probesets or entrez-gene-ids for a given KEGG > pathway, but I need to know which probeset represent the individual > KEGG gene (eg.: the gene "mmu:108960" is part of pathway "mmu04210", > but what is the underlying entrez gene or probeset...) > Thanks in advance for any help The annotation packages have this information in them. For hgu133a, for example, there is the hgu133aPATH that contains all the pathways that a particular affy id is part of. > library(hgu133a) > mget(ls(hgu133aPATH)[1:20],hgu133aPATH) Sean