22 MICROBIAL CELL WALLS 



became even more evident when it was discovered that the 

 -w^all of Micrococcus lysodeikticus was composed solely of 

 hexosamine, glucose, and the four amino acids: alanine, glu- 

 tamic acid, glycine, and lysine (Salton ^*'). The mucocom- 

 plexes can be separated into further groups, depending on 

 whether they are predominantly peptide, as in mucopep- 

 tides, or predominantly polysaccharide, as in mucopolysac- 

 charides. (See Table 7.) In addition to the mucopeptides 

 and mucopolysaccharides, Baddiley, Buchanan, and Carss «- 

 discovered that some bacterial cell walls also contain major 

 components of ribitol- and glycerolphosphate polymers. 

 These polymers have been called the "teichoic acids" (from 

 Greek x^lyoz, = wall) by Armstrong, Baddiley, Buchanan, 

 Carss, and Greenberg.^^ 



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