A, shown is the relative abundance of the three most frequent HCDR3 amino acid sequences before selection and the most frequent HCDR3 motif after selection of the alloHSCT Fab-phage library by three rounds of panning on CLL cells. VGR stands for VGRLQYDYYFDS; YGM stands for YGMDV; THI stands for THIVVVIPPGYFDL; GGQ stands for GGQTIDI (the HCDR3 of JML-1). Blue and red columns show the respective relative abundance before and after selection. The values on top of the paired columns give the log2 enrichment. B, amino-acid sequences of the variable light (VL) and heavy chain domains (VH) of selected post-alloHSCT Fab JML-1 (U.S. Patent 8,877,199). FR and CDR denote framework regions and complementarity-determining regions, respectively.