Figure 2. Fluorescence spectrum of cephalochordate GFPs excited at 470 nm (for both Asymmetron lucayanum and Branchiostoma floridae) and 390 nm (for A. lucayanum only).

For the excitation at 470 nm, the A. lucayanum spectrum curve was shown in dark blue while the B. floridae specturm curve was shown in light green B. floridae GFPa) and darker green B. floridae GFPe). For the excitation at 390 nm, only the spectrum curve for A. lucyanum was shown (in light blue), since no fluorescence at that excitation wavelength was observed for B. floridae.