Protein-Protein Interaction Changes in an Archaeal Light-Signal Transduction

Figure 5

𝑝pR_K minus ppR (a) and 𝑝pR_M minus ppR (b) infrared difference spectra without (red lines) and with (blue lines) pHtrII in the 3580–3270 cm⁻¹ region. Spectra are measured at 77 K (a) and 250 K (b) upon hydration with D₂O. The original data appeared in [21].