Table 1.

Detection of pIRS2_1097-1105 in human hepatocellular carcinoma tissues by mass spectrometry of MHC-associated peptide extracts

Tumor tissue sample					Normal adjacent tissue sample
HCC1	HCC2	HCC3	HCC4	HCC5	NAT2	NAT3	NAT4	NAT5
++*	+++	++	+++	ND	ND	ND	+	ND

*Copies per cell: ND: not detected, +: <1, ++: 1–5, +++: 6–20.

pIRS2, phosphopeptide from insulin receptor substrate 2.