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Differential solvent extractability of PORA- and FCBP-bound pigments and to distinguish esterified and nonesterified pigments. Stromal PORA and FCBP were prepared as described in Figure 4 and extracted with acetone and hexane. After phase separation, nonesterified pigments present in the acetone/buffer phase (gray bars) and esterified pigments present in the hexane phase (white bars) were quantified.
