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Conserved domains in the C-terminal region of the various USF proteins. The amino acid sequence of the C-terminal region of USF2 was aligned with the same region in human USF1 (amino acids 157–310; Gregor et al., 1990), Xenopus laevis USF (amino acids 150–303; Kaulen et al, 1991), and sea urchin USF (amino acids 148–265; Kozlowski et al., 1991). Location of the various conserved domains is indicated above the sequences. Unchanged residues are outlined in gray.
