The location of the PCDH 1 is in 5q 31-33 chromosome which is the harboring zone for several genes like Interleukin-4 (IL-4), Interleukin-5 (IL-5), Interleukin-13 (IL-13), the candidate genes for asthma and allergy traits [2, 3]. The gene discussed is IL4; the disease is Allergy.