  A practical, biologically motivated case of protein complexes (immunoglobulin
G and FcRII receptors) moving on the surface of mastcells, that are common
parts of an immunological system, is investigated. Proteins are considered as
nanomachines creating a nanonetwork. Accurate molecular models of the proteins
and the fluorophores which act as their nanoantennas are used to simulate the
communication between the nanomachines when they are close to each other. The
theory of diffusion-based Brownian motion is applied to model movements of the
proteins. It is assumed that fluorophore molecules send and receive signals
using the Forster Resonance Energy Transfer. The probability of the efficient
signal transfer and the respective bit error rate are calculated and discussed.
