SynopsisThe energetically possible conformations for the alternating heteropolysaccharide backbone of murein, consisting of N-acetylglucosamine and N-acetylmuramic acid, were calculated using an empirical approach. The calculations were carried out for regular as well as for random-chain polymers, resulting in a model for the saccharide strands featuring extended chains with a length increment of 0.98-1.02 nm per disaccharide unit and peptide attachment sites at every second saccharide residuum pointing into all directions with propagation angles of 80-100" between consecutive sites.
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