![XA 13/21 XA 13/21](/site/templates/images/probes/MAPS/JPG/Map-D-5602.jpg)
The XA 13/21 mix of specific probes allows detecting copy number variations for chromosomes 13 and 21. The green labeled probe hybridizes to a region at 13q14 including the RB1 locus and the orange labeled probe hybridizes to a region at 21q22 including the DSCR4 (Down syndrome critical region 4).
Probe maps are created in accordance with the intended purpose of the product. Solid colored bars do not necessarily indicate that the probe fully covers the indicated genomic region. Therefore, caution is advised when interpreting results generated through off-label use. Probe map details based on UCSC Genome Browser GRCh37/hg19. Map components not to scale. Further information is available on request.