ERAP1 and neoplasm: Fhit-transfected B11 tumor cells had increased transcriptional levels of the following genes: Fhit, H-2 class I heavy chains, β2-microglobulin, Tap-1, Tap2, LMP2, LMP10, Tapasin, calreticulin, Erap1, ERp57, PA28α, Ttp1, and Ttp2 (Figure 1B).