
Fig. 3. (A) Near-ultraviolet circular dichroism (CD) spectra of Gillichthys
mirabilis and G. seta muscle-type lactate dehydrogenases
(A4-LDHs) at 20 °C, and the subtraction spectrum (G.
mirabilis minus G. seta; MIR minus SETA). (B) Second-derivative
absorbance spectra of the two forms at 20 °C and the subtraction spectrum.
The peak-to-trough distances, a and b, used to calculate the
ratio r are illustrated. Note the difference in x-axis range
between the two panels. Mir, to be defined; SETA, to be defined;
MRW,
residue ellipticity; d2A/dx2, second
derivative of the spectrum.