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HPLC elution profile of pigment extracts recorded at 770 nm for the C. tepidum wild type (A), the CT2256 mutant of C. tepidum (B), and the R. sphaeroides strains T6G5 (C) and T6G4 (D). The identified peaks are BChl aP (1), BChl a esterified with tetrahydro-GG (Δ2,6-phytadienol) (2), BChl a esterified with dihydro-GG (3), and BChl aGG (4).
