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S-layer glycoprotein glycan of G. stearothermophilus NRS 2004/3a (16). The sites of action of the different rhamnosyltransferases and the methyltransferase are indicated with arrows. Note that the α1,2- and α1,3-rhamnosyltransferase activities of WsaE and the β1,2-rhamnosyltransferase activity of WsaF also apply for the terminal repeating unit; for simplification, this is not indicated in the figure.
