Fig. 5.

Excitation anisotropy spectra (λ_em 300–340 nm) of 2 mM RNase A in 50 mM Tris–HCl (pH 7.2) containing 80 % propylene glycol (P.G.) obtained for 1PE (black square), 2PE (white circle) and 3PE (black circle) at −60 °C