The study was conducted in an L-format with automated Glan-Thompson polarizing prisms controlled by FluorEssence software (Horiba). The anisotropy values for each dye and dye-conjugate were determined at relatively low concentrations with absorption below 0.2 a.u. to avoid aggregation of the dye or agglomeration of the proteins. The details of the procedure were published previously (8 (link)).