Dear all,
For a project I would like to compare the gene expression of different immune cells in both mouse and human. For the immune cells of interest, microarray data is available. The microarray data for the human immune cells have been generated with the same platform. The microarray data for the murine immune cells have been generated with the same platform, although with a different platform than used for the human immune cells. I performed RMA normalization using the rma function in the affy package separately for the human and the murine datasets. However, I would like to compare the gene expression levels of mouse and human immune cells. I therefore would like to ask you the following questions:What is the recommended way to normalize the RMA normalized datasets of human and mouse, so that I can compare/combine both datasets?
Thanks a lot for your help. 
Kind regards, Bas 		 	   		  
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