title: Biology in pictures. Gut reaction.
mesh_terms: D000818:Animals; D005455:Fluorescent Antibody Technique; D015395:Histocompatibility Antigens Class I / Q000032:analysis*; D007421:Intestine, Small / Q000737:chemistry*; D051379:Mice; D009030:Mosaicism
chemical_list: D015395:Histocompatibility Antigens Class I