facilitating cell technology and the specific details on how they shut down the memory cells of the donor bone marrow and not the facilitator cell. They use immuno supressants but how does it not affect the facilitator cell. And if the bone barrow gets immuno supressants to shut down the T-memory cells how do they contribute to the imune system of the recipiant? It also has something to do with making a chimera cell or something but its just hard to understand how they can shutdown the T-memory cell on the transplanted bone marrow but have working immunity for the host? The key is the facilitator cell but it has a rarity of 0.4 percent in the marrow. Do they then like reproduce to a higher factor of presence? or? another question: I'm reading that hartvalves wont get rejected by the body cause there is no dead tissue, but doesnt dead tissue get rejected to or eaten by granucites?