(B) Sequence alignment of Fab71 VH3-30 with HCDR3 regions from the different databases that differ from Fab71 by ≤ 3 residues (upper panel). Amino acids differing from Fab71 are highlighted by orange boxes. Lower panel: sequence alignment of Fab71 light chain VK3-15 with DK_VL2-14 that is naturally paired with DK_VH3-07. 