**Figure 2. **Thiol reactivity of
a-crystallins. **A**: Time course for the reaction of dogfish and
bovine α-crystallins with DTNB under pseudo first order conditions and **B**:
first
order log transform of the data in **A**, showing the lines
of best fit for the slowly reacting (k=0.0034 and 0.0048) class of
sulphydryls. **C**: First order log plot of the differences between
the extrapolated and observed values in **B**, showing the more
rapidly reacting (k=0.21 and 0.25) class of sulphydryls.