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Sequence alignment of the spOrc3 subunit with D. melanogaster, X. laevis, human, and S. cerevisiae Orc3 proteins by using the GCG pileup program. Identical residues are indicated by shaded boxes, and similar residues are indicated by clear boxes. The sequences corresponding to the three tryptic fragments isolated from the purified spOrc3 subunit are underlined.
