Fig. 4.

Patterns of labelling for major histocompatibility complex class I (MHC I)/MHC II in intestinal epithelial cells (IEC) of patients with active inflammatory bowel disease (IBD). The proportion of the subcellular expression for MHC I and II in IEC was assessed as described in Materials and methods in five patients per localization. The results are presented as a percentage of total counts. BLM: basolateral membrane; APM: apical membrane; EE: early endosome; VLE: late endosome; MVB: multi-vesicular body; MLB: multi-lamellar body; EDB: electron-dense body (error bars represent the standard error of the mean).