So a cell that contains this fertility factor, the F factor, is called our F plus, or the donor cell. While the cell that does not contain the F factor, our fertility factor, is known as our recipient or F minus. So, to initiate the process of conjugation, the donor cell must actually use its F plasmid or f factor to actually replicate or to actually produce the proteins that build our sex Pillus. Now, once again, the sex Pillus is basically a hollow protein that connects one cell to the other cell, and it allows the transfer of our genetic information. So the donor cell, after it builds the cytoplasmic bridge, our sex pillars, then replicates its plasmid and transfers replicated plasmid to the other cell. Now, if the plasmid is in fact an f plasmid, then the recipient cell gains the ability to build the sex pilli and becomes a donor cell.