Breast Neoplasms/metabolism; Epithelial Cells/metabolism; Mammary Glands, Animal/metabolism; Mammary Glands, Human/metabolism; Protein Kinase C/metabolism; Adult; Animals; Breast Neoplasms/genetics; Breast Neoplasms/mortality; Breast Neoplasms/pathology; Breast Neoplasms/physiopathology; Cell Differentiation/genetics; Cell Line, Tumor; Cell Polarity/genetics; Cell Transformation, Neoplastic; Disease Progression; Epithelial Cells/pathology; Female; Humans; Hyperplasia/genetics; Mammary Glands, Animal/growth & development; Mammary Glands, Animal/pathology; Mammary Glands, Human/pathology; Mice; Mice, Inbred Strains; Microarray Analysis; Mutant Proteins/genetics; Organogenesis/genetics; Phosphorylation; Pregnancy; Protein Kinase C/genetics; Survival Analysis; Transgenes/genetics