The WHSC1 region probe is optimized to detect copy numbers of the critical region at 4p16. The Chromosome 4 Satellite Enumeration (SE) probe is included to facilitate chromosome identification. Know more at: http://www.creative-bioarray.com/Wolf-Hirschhorn-WHSC1-Satellite-Enumeration-4-Probe-FMDC-52-item-4639.htm