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Visible and CD spectra of reproduced solutions by mixing 1 (Dp3G, 0.1 mM) and Al3+ (1 eq.) with 0-3 eq. of co-pigment, 5CQ (2), 5pCQ (3), or 3CQ (4) in buffered solutions of 2 mM. (A) Cell sap obtained from blue hydrangea sepals. (B) With 5CQ (2) at pH 4.0. —: 0 eq., —: 1 eq., —: 2 eq., —: 3 eq. (C) With 5CQ (2) at pH 3.2. —: 0 eq., —: 1 eq., —: 2 eq., —: 3 eq. (D) With 2 eq. of co-pigment, pH 4.0, —: 5pCQ (3), —: 3CQ (4). (E) With 2 eq. of co-pigment, pH 3.2, —: 5pCQ (3), —: 3CQ (4).
