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Sequence alignment of TbASNA and LdASNA with EcAsnA. The secondary structure (Sec Str) elements derived from the crystal structure of TbASNA are placed at the bottom of the alignment. The loop in TbASNA and LdASNA (herein called loop 2) contains a ∼19-residue insertion (red box) that is absent in E. coli and archaeal AsnAs.
