In addition, cells at the very tops of the crypts stained for PMS2 (panel A) or ERCC4 (XPF) (panel C) have low levels of these DNA repair proteins, so that such cells show the blue-gray DNA stain as well.
Ademais, as células na parte máis superior das criptas tinguidas para PMS2 (panel A) ou ERCC4 (XPF) (panel C) teñen baixos niveis destas proteínas reparadoras do ADN, polo que estas células mostran tamén a tinguidura gris azulada do ADN.