The 11 kDa full-length DCD protein and proteolytic peptides derived from it have been proposed to have diverse biological functions, such as acting as a growth and survival factor in breast cancer [1] and in neural cells [10,11], displaying antibacterial activity [2,12,13], and inducing cancer-associated cachexia in animal models and in cancer patients [14,15]. This evidence concerns the gene DCD and breast cancer.