Lateral diffusion of concanavalin A receptors in the plasma membrane of mouse fibroblasts.

Lateral diffusion of receptors binding fluorescein labeled concanavalin A and its succinylated derivative has been measured by bleaching portions of the labeled surface and following return of fluorescence to the bleached spot. Binding of either concanavalin A or its succinylated derivative causes restriction of mobility of the surface receptors for this lectin. The degree of restriction is a function of time after binding the lectin.