The results were clear-cut: the Santa-Cruz (sc-1661), Proteintech and Sigma antibodies all detected recombinant p16INK4A on Western blots and yielded robust immunolabelling in cervical carcinoma tissue sections, but, no specific p16INK4A immunolabelling was observed in the cornea, drainage angle, retina or optic nerve of human or rat tissue sections. This evidence concerns the gene CDKN2A and cervical carcinoma.