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Alignment of the proteolipids from M. mazei (Mma), M. thermoautotrophicum (Mth) (28), M. jannaschii (Mja) (2), A. fulgidus (Afu) (15), H. salinarum (Hsa) (10), and S. acidocaldarius (Sac) (4). Conserved residues are shaded, and putative transmembrane segments are boxed. The boundaries of the transmembrane segments are hypothetical. Leader sequences of the proteolipids from H. salinarum and S. acidocaldarius are not shown.
