Frequency responses (phase and modulation) of Lysozyme in PB 7.4 acquired on ChronosFD using a 300-nm LED. The emission was collected through a high pass filter 320LP. The data is best fitted with two decay times: τ2 = 0.7 ns and τ2 = 2.58 ns, f1 = 0.26 (x² = 1.1).