HERG channels have been shown to be expressed in various cell lines like human and murine neuroblastoma, human leukaemia (preosteoclastic, lymphoblastic, myelogenous and promyelocytic) [49-51], human rhabdomyosarcoma, colon carcinoma, mammary carcinoma, squamous cervical, endometrial cancer, gastric and glioblastoma [52-55]. Here, KCNH2 is linked to breast carcinoma.