Fig. 2.

Reaction network of perireceptor and receptor events within a moth olfactory sensillum. Chemical model N, with the hypothetical enzyme N catalyzing the deactivation of the complex FB. Twelve reactions are numbered. Reactions 7, 9, and 11 represent binding to and dissociation from the enzymes E and N. The catalytic reactions 8, 10, and 12 are irreversible. Reaction 13 (FB* ⇒ F + B*) is not shown. For model parameters see Fig. 4