Figure 1 :p16 expression in CIN and invasive squamous cell carcinoma of the cervix. A, normal cervix, negati ve for p16; B, CIN 1, negati ve for p16; C, CIN1, nucleocytoplasmic positi vity; D, CIN 2, nucleocytoplasmic positi vity; E, CIN 3, strong nuclear positi vity; F, squamous cell carcinoma, diff use, strong nuclear and cytoplasmic positi vity for p16