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The cell wall of Thermomicrobium roseum, a Gram-negative, obligately thermophilic bacterium, has a composition unlike other Gram-negative thermophilic organisms. The purified cell wall was composed predominantly of a protein with a monomeric molecular weight of 75 000. The amino acid composition of this protein revealed high concentrations of proline, glutamic acid, glycine, and alanine.
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Merkel et al. (1980) studied this question.
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