The Cyclin D1/CEP 11 Probe is a mixture of two probes, The CCND1 probe is approximately 300 kb , contains the CCND1 gene. The second probe is specific to the D11Z1 alpha satellite centromeric repeat of chromosome 11. Know more at: http://www.creative-bioarray.com/Cyclin-D1-CEP-11-Probe-FHPC-035-item-4676.htm