Table 1.

Rate and equilibrium constants for the reversible hydrogen transfer between Cys thiyl radicals and Gly and Ala in model peptides

Peptide	C-H donor	RS• + H-C	RSH + •C	K	Method
N-Ac-CysGly6	Gly	k6 = (1.1±0.1)×105 s-1	k-6 = (8.9±0.4) ×105 s-1	K6 = 0.123	Pulse radiolysis
	Gly	k6 = 1.0×105 s-1	k-6 = 8.9×105 s-1	K6 = 0.123	LFP
N-Ac-CysGly2AspGly3	Gly	k25 = 1.0×105 s-1	k-25 = 8.0×105 s-1	K25 = 0.125	LFP
N-Ac-CysAla2AspAla3	Ala	k14 = 9.2×103 s-1	k-14 = 1.0×105 s-1	K14 = 0.092	Pulse radiolysis
	Ala	k14 = 1 × 104 s-1	k-14 = 1.0×105 s-1	K14 = 0.100	LFP