Table 1.

Distribution of C-terminal residues in peptides uniquely presented by abacavir treated and untreated cells

	Abacavir
C-terminal residue	Untreated	Treated	P value*
W	218	↓ 95	2E-05
F	89	↓ 31	1E-03
Y	42	33	0.38
L	25	25	0.10
I	14	↑ 45	1E-09
M	6	7	0.39
V	0	↑15	5E-07

*Two-tailed Fisher exact test. All C-terminal residues for which two or more peptides were identified are listed.