NumtS UCSC Genome Browser tracks (I): nuclear tracks. NumtS browsing on UCSC Genome Browser can be performed by displaying a genomic region of interest or by directly searching a NumtS ID in the Genome Browser gateway. The graph shows the genomic region where the HSA_NumtS_014 is located (in the 'NumtS assembled' track) and the ten constituent HSP_NumtS (in the 'NumtS' track). Details about each item can be displayed by clicking on it, as pointed out by the red arrows. The red-framed "browser" link in the HSA_NumtS_014_b5 detail page links to the mitochondrial NumtS tracks shown in Figure 6. An essential flowchart describing NumtS tracks browsing is given in additional file 4 UCSC_NumtS_browsing.pdf.