Figure 2.

The computer tracing representing the reduction of 5,5′-dithiobis-2-nitrobenzoic acid (DTNB) by the lenses incubated without sulforaphane (controls), determined in the absence (□) and the presence (○) of aurothiomalate. Relative to rates depicted in Figure 1, the difference in two activities is much less, indicating lower thioredoxin reductase levels in the lenses incubated without sulforaphane.

Abbreviations: Abs, absorption; Sec, seconds.