add visualization spec for Raimundez model

[plakrisenko]

Figure 1C

Figure 1D

[plakrisenko]

Figure S3

[plakrisenko]

Figure 2

[plakrisenko]

Figure S4

[stephanmg]

As suggested by @JanHasenauer please correct for this in the figures: The x-axis uses the real value instead of the position in the sequence. Therefore, the responses at low concentrations are indistinguishable.