I have downloaded some microarray data from https://www.ebi.ac.uk/arrayexpress/experiments/E-GEOD-30321/ which are microarray data from some CHO-K1 culturing. The microarray is signed: "Affymetrix Chinese Hamster Ovary (CHO)-specific custom array"
To be able to use the data within the samples I have to convert the affymetrix IDs into gene IDs or symbols. How can I do that? I searched in Ensembl Biomart, but "CHO" or "Cricetulus griseus" is not there. Can it be alternatively done with R and when with which annotation package?
Thank you very much.