Figure 1From: Investigating AP-2 and YY1 protein expression as a cause of high HER2 gene transcription in breast cancers with discordant HER2 gene amplificationAP-2 α/β (a, c, e) and YY1 (b, d, f) immunostaining. Tumour nuclear staining varied from homogeneously strong (a, b) to a mixed (c, d) pattern but was intense in normal glandular tissue (e, f) (arrow) (×20 magnification).Back to article page