Figure 2.
Difference between two signal averaged D2O reference transients. (A) Difference IR absorbance transient of 20 mM potassium phosphate buffer (pD 7) detected at 1619 cm−1 with a 1000 shot average. (B) Difference fluorescence transient of 400 μM Trp in 20 mM potassium phosphate buffer (pD 7) excited at 285 nm and monitored at 350 nm using a 200 Ω resistor and a 5000 shot average.