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Domain architecture of the SsMTP and SsMTP-1 precursors using the SMART program. The domain structure is schematized: SS, signal sequence; TM, transmembrane domain; Thermopsin, thermopsin-like catalytic domain; PKD, polycystic kidney disease domain; RPT, Repeat Pattern Toolkit; Y_Y_Y, two component regulator three Y domain; and TM-GPI, transmembrane domain, including the glycosylphosphatidylinositol signal sequence.
