KRT14 and breast cancer: To determine what types of mammary tumor models K14-cre; ApcCKO/+ mice represent, gene expression profiles of three acinar-type mammary tumors, the most frequently found histological pattern in K14-cre; ApcCKO/+ in the mixed background, and three cre-negative normal mammary gland samples were determined using Affymetrix GeneChip M430 2.0 arrays.