HLA-C and hepatocellular carcinoma: In a study comparing phosphorylation between HCC cases, margin tissue from five patients without these diagnoses (caused by adenoma transformation) (Fig. 3, C and D) or unknown etiology (Fig. 3, A and B) expressed, on average, 11% (0%–25%) of the phosphorylated MHC peptides seen on the corresponding tumor tissue (N. Buettner et al., unpublished data).