The percentage of cells involved in trogocytosis varies with the organ and is not related to the extent of tissue chimerism.

Trogocytosis positive cells are identified as cells expressing the EGFP gene and the H2Kd gene. The extent of trogocytosis varies widely amongst the different organs and is more frequent in organs that have high blood flow. This experiment shows trogocytosis in only the one direction (Balb/c to C57Bl/6).
a) Chimerism is based on the percentage of EGFP+ cells.
b) Trogocytosis can only be observed by the transfer of H2Kd (red) onto EGFP+ (green) cells. The percent of double positive cells is based on the total of EGFP+ cells.