Here, we examined ADAM12 protein levels in several cell lines representing different intrinsic subtypes of breast cancer: claudin-low cell lines Hs578T, SUM1315MO2, BT549, and SUM159PT, basal cell lines SUM102PT and SUM149PT, and luminal cell lines MCF-7 and SUM225CWN [19]. The gene discussed is ADAM12; the disease is breast carcinoma.