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Lipoteichoic acid (LTA) of group A streptococci, type M 29 was studied. Chemical and 13C NMR spectroscopic analysis showed that the polymer contained poly(glycerophosphate) chain consisting of 12-14 glycerophosphate elements united by the 1----3 type phosphodiether bond and diglucosylglyceride. Oleic, stearic, palmitic and palmitoleic fatty acids predominated in the polymer composition. The content of the fatty acids amounted approximately to 2 per cent of LTA dry weight. The poly(glycerophosphate) chain contained 6-7 ether linked alanyl moieties. The results of the LTA biological study were analyzed in comparison to the data on a previous study of antitumor and cardiotoxic properties of teichoic acid from Streptomyces levoris K-3053 which is structurally close to the LTA hydrophilic moiety. It was assumed that the molecule negative charge had an effect on the cardiotoxic and antitumor activity.
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