Recognition of the PHA blasts of patient HAR. Cytolysis of nonleukemic PHA blasts obtained from patient HAR and HLA-A-2/3; -B7/8 EBV-transformed target cells unpulsed (○) or pulsed (•) with peptides eluted from the blasts of patient HAR were assayed. PHA blasts were prepared from the PBMC of patient HAR. collected upon complete remission. Representative results and means of duplicates are shown for CTL 1 and 2. (⧫), EBV HLA-A2/3; B7/8 + AML HAR peptides; (◊), EBV HLA-A2/3; B7/8.