For instances, a large part of breast cancer cells shows higher level of ALDH1A3, consistent with a previous report (Marcato et al. 2011b) claiming ALDH1A3 to be the main contributor in ALDEFLUOR assay in breast cancer, whereas liver cancer and kidney cancer show high level of ALDH1A1. The gene discussed is ALDH1A1; the disease is breast carcinoma.