The structure of a novel diphosphodiester compound recently detected in Desulfovibrio desulfuricans cells [Santos, Fareleira, Pedregal, LeGall & Xavier (1991) Eur. J. Biochem. 201, 283-287] was fully elucidated using a combination of n.m.r. techniques in aqueous and in methanolic solutions. The novel metabolite was identified as 3-methyl-1,2,3,4-tetrahydroxybutane-1,3-cyclic bisphosphate, and the minimum energy conformation is presented. The two chiral centres have the relative configuration RS.
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Turner et al. (1992) studied this question.
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