system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Cell type that lacks HLA antigen is:
assistant
The correct answer is  Class I MHC is expressed on all nucleated cells and platelets Class II MHC is expressed on APCs (macrophages, monocytes and dendritic cells), B- cells, Endothelial cells, and fibroblasts.