Figure 3.

Identification of the natural ligand Q3O-(Glc)-Gal. (A) RP-HPLC chromatogram of hazel pollen extract (black line) and the ligand of nCor a 1 isolated from pure SEC fractions (red line) using a C18A column. (B) UV/Vis spectrum of the ligand purified from pollen. Absorption maxima at 253 nm, 267 nm, 299 nm, and 357 nm are indicated. (C) ¹H, ¹³C HSQC spectrum of the ligand purified from pollen in d₆-DMSO. The structure is shown on the top left. A and B indicate the two different hydrogen atoms at positions 6″ and 6″′, respectively.