<prompt> All the following are macrophage exceptMonocyteLymphocyteKupffer cellMicroglia  <response>: In humans, the gene encoding the most important histocompatibility molecules are clustered on a small segment of chromosome 6, the MHC complex or the human leucocyte antigen HLA complex in humans, so named because MHC encoded antigens were initially detected on leucocytes - Robbins7th203Major Histocompatibility Complex 