<prompt> P Selectins are associated with which of the following processes in leukocytes?RollingAdhesionMarginationAll of the above  <response>: The initial rolling interactions are mediated by a family of proteins called selectins. There are three types of selectins: one expressed on leukocytes L-selectin, one on endothelium E-selectin, and one in platelets and on endothelium P-selectin. Ref: Robbins, 8th edition, Chapter 2. 