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Possible structure of phsophatidyl glycerol from (A) predominantly SCFA/SCUFA-containing bacteria and (B) predominantly BCFA-containing bacteria with particular reference to growth at low temperatures. The fatty acids esterified at the 1- and 2-carbon positions are C18:1Δ11 and C16:1Δ9, respectively in (A) and anteiso C15:0 in both positions in (B).
