Which of the following statements best applies to the following diagram?: (A) Depicts the cell-membrane MHC product associated with narcolepsy, (B) Essential for the transplacental passage of antibody, (C) Found on T and B lymphocytes and all nucleated cells, (D) Present on macrophages but not neutrophils
Answer is C. The figure shown in the question is a schematic representation of the MHC class I molecule, which has a CD8 binding site (a3 ) and a peptide-binding site (a1 and a2 ). MHC class I is active on all nucleated cells.