(b).

The enhancement factors, E _B and E _I, obtained using the two different metrics.^†

Enhancement factor (a.u.)	E B	E B	E I
Metric used in reanalysis	B rel5	B relDS	I/I 0
HEWL + Nitrate I	1.53	1.18	1.44
HEWL + Nitrate II	2.54	2.13	1.68
Mean Nitrate I and II	1.90	1.52	1.59
HEWL + Nitrate8	2.01	1.77	0.83
HEWL–ascorbate co-crystal	2.65	1.86	1.90

^†For I/I ₀, this is defined as the ratio of D _1/2 (dose to half intensity) with scavenger added to D _1/2 of the native. For the B _rel analysis, the enhancement factor is the ratio of ΔB _rel/ΔD without scavenger to ΔB _rel/ΔD with scavenger (thus a value >1 implies some protection).