> > dear list, > > > > i'd like to know how can i download the conservation track for several > > genomic ranges belonging to different chromosome sequences > > This is not supported yet, mostly because whenever people have multiple > regions, they have a lot of regions, and the current, simple implementation > would be too slow. It is possible though to upload a track to UCSC and ask > it for the regions that intersect that track. I'll put that on the TODO > list; actually it was already on there. For now, you might just have to loop > in R and make separate requests. Is there a small, complete example of doing this with the current version of rtracklayer ? I also have a lot of regions.