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A predicted alpha-helical domain with a conserved ER motif An uncharacterized alpha helical domain containing a highly conserved ER motif and typically found as a tandem duplication. Contextual analysis suggests that it functions in a distinct peptide synthesis/modification system comprising of a transglutaminase, a peptidase of the NTN-hydrolase superfamily, an active and inactive circularly permuted ATP-grasp domains and a transglutaminase fused N-terminal to a circularly permuted COOH-NH2 ligase domain.
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