Pulse radiolysis pepsins

R.H. Bisby, R.B. Cundall, G.E. Adams, and M.L. Posener FREE RADICAL REACTIONS WITH PEPSIN STUDIED BY PULSE RADIOLYSIS... 

Figure 2 Transient spectra from pulse radiolysis of N2O saturated solutions of pepsin containing KSCN.

At a high concentration of SCN (1 mol dm ) pulse radiolysis shows (Figure 2b) that (SCN)2 does not react to produce a product spectrum, but instead decays by a second-order radical-radical reaction. However, Figure 2a shows that at a low SCN concentration (2 mmol dm ), (SCN)7 does react with pepsin. 

Figure 3 Transient spectrum from pulse radiolysis of aerated solutions of pepsin (Img/ml) containing KBr (50 inK) at pH 1.6. Measured 100 ps after the pulse. Inset effect of pH on the transient absorption at 575 nm.

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