Gemonic Library - Deletion/Reduction of Chloro/Mit DNA (Jul/10/2009 )

Can someone give my a link to a protocol to separate or reduce the amount of chloroplast or mitochondrial DNA from a genomic DNA extraction. I am constructing a genomic library, and have a good number of clones, but they tend to be chloro/mit in make up.

I don't have any protocols for it, but you should be able to do this by density gradient centrifugation using cesium chloride.