Fig. 1From: An ontology for major histocompatibility restrictionMHC presentation and restriction. a. HLA locus of human chromosome 6 encodes specific MHC protein chains. b. The MHC on APC presenting epitopes can be bound by antibodies to establish the serotype. c. If responding effector cells are known to be CD4 cells, the MHC presenting the epitope can be presumed to be class II restrictedBack to article page