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. 2007 Apr 9;177(1):29–37. doi: 10.1083/jcb.200611079

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Copyright © 2007, The Rockefeller University Press

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Figure 1. — OS-PP-Dol donors and predicted subunit compositions of the OST from selected eukaryotes. The left portion of A–D shows the oligosaccharide structure of the in vivo donor for N-linked glycosylation. N-acetylglucosamine residues are designated by squares, mannose residues are shown as circles, and glucose residues are shown as triangles. Red saccharides are transferred by cytoplasmically oriented ALG gene products, and blue residues are transferred by luminally oriented ALG gene products. The right section of each panel shows the predicted (A, T. cruzi; B, C. neoformans; or C, T. vaginalis and E. histolytica) or experimentally determined (D, S. cerevisiae) composition of the OST complex. The color code of the subunits (red, green, and blue) designates subcomplexes detected in higher eukaryotes (Karaoglu et al., 1997; Spirig et al., 1997). The yellow bar designates the ER membrane.