Nucleolar localization of hSIN3B and ETO homologues. The first column of each panel shows the Nomarski index. The second column shows nuclear staining with DAPI. The third column shows the localization of individual proteins. The fourth column shows nucleolar localization of the B23 nucleolar marker. The fifth column shows a merge of B23 and individual proteins. hSIN3B (I) and all the ETO homologues (II – IV) show colocalization with B23. AML1-ETO lacks colocalization with B23 (V). Size bars measuring 10 μM are shown in panel II.