Figure 3: Invasive adenocarcinomas demonstrated expression of hormone receptors and cyclin D1. Representative panels illustrating H&E staining and immunohistochemistry for ERα, PgR, cyclin D1, Ki67 and ErbB2 in mammary adenocarcinomas from CERM, CERM/D1 and D1 mice. Arrows indicate representative stained cells with either nuclear (ERα, PgR, cyclin D1, Ki67) or higher intensity 2+ membrane (ErbB2) staining. Size markers are indicated on all panels.