They also identified the squamocolumnar junction cell-specific biomarkers keratin 7, AGR2, CD63, matrix metalloproteinase 7, and guanine deaminase and documented their expression in HPV-infected cell lines, high-grade cervical intraepithelial neoplasms, and cervical carcinoma (27). The gene discussed is CD63; the disease is cervical intraepithelial neoplasia.