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Alignment of the deduced amino acid sequence of PTD with GDEF1, PD2, TM6, AP3, and DEF. Fifteen residues diagnostic of the TM6 group are shown with a black background. The Paleo AP3 and Eu AP3 motifs (Kramer et al., 1998) are boxed. Dots indicate identical residues. Dashes represent gaps introduced to maximize the alignment.
