Is There a Signalling Mechanism in Red Bood Cells?

Red bood cells are very rigidly structured with their a actin cito skeleton to to form this doughnut shape. They don't have a lot of movement in and out, um the endocitic pathway and exocitic pathway. Yeand so that could put something on the surface an those cells that wouldn't be that way in other cells,. That that's how i would look at it. Yes.