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Local sequence alignments comparing the three iron-binding His box domains in FAD2-diverged desaturases from plants and fungi. The first His residue in each box is labeled i, and features are indexed negatively amino-proximate and positively to the carboxyl side of i. The sequence abbreviations are described in the Fig. 2 legend except: CaACET (=CalpACET), CAA76158 (14); AtDES, AAA32782 (1); DcACET, AAO38033 (15); DsACET, AAO38036 (15); RoDES, AAV52631.
