Various functional motifs are conserved among N-CoR, SMRT, and SMRTER. Alignments of xN-CoR, human N-CoR (hN-CoR; GenBank accession no. AF044209), mouse N-CoR (mN-CoR; GenBank accession no. U35312), human SMRT (hSMRT; GenBank accession no. AF125672), and Drosophila SMRTER (GenBank accession no. AF175223) are given for the SNOR, SANT, ITS, LSD, and CoRNR motifs. Dashes indicate sequences identical to that of xN-CoR, while blank spaces are gaps introduced for better alignments. Amino acid positions of each motif in the respective protein are also indicated.