library("Gviz")
gen <- "hg38"
chr <- "chr7"
start <- 38290160
end <- 38303219
if(interactive()){
xenogenestrack<-xenorefGenes_UCSC(gen,chr,start,end,showId=TRUE)
plotTracks(xenogenestrack, from=start, to=end)
} else {
data(xenogenestrack)
plotTracks(xenogenestrack, from=start, to=end)
}
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