Diffusion FRAP models corrected for photofading and immobile fraction and their compatibilities.

In Binding Diffusion* (14), ck represents the concentration of ligand receptor complex in the kth image, ckM is the mobile fraction of c, β is the immobile fraction, and τ is the time needed for each image scan. Finally, g1 and g2 are the bleaching functions for bounded (c) and free (u) proteins.