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A. PFD-like extension of STAND, sesA and sesB homologs (boxed in grey, yellow and green respectively; the sequence with a purple box is a NAD domain protein) from various species have been aligned using ClustalW. The A (GSGxQF) and B (GGTQN) motifs have been boxed in red and blue respectively. B. Weighted consensus of the A and B motifs generated with the MEME algorithm.
