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Model of assembly of the flagellin N-linked glycan. The previously identified glycosyltransferases (AglO, AglA, and AglL) as well as the oligosaccharyltransferase (AglB) are shown. The postulated functions of AglX, AglY, and AglZ in generating ammonia via the glutaminase activity of AglY and its subsequent transfer via the ammonia tunnel of AglZ to the amidotransferase AglX to form the acetamidino group on sugar 3 are depicted.
