Primary sequence alignment of antibody CDR loops used
for the library
of β-hairpins (3D-model): analogs of pembrolizumab (1c–s), GY-14 (2a,b), tislelizumab
(3a,b), durvalumab (4a,b), mAb59 (5), atezolizumab (6), and MW11-h317 (7). Regular and bulged hairpins (straps A and B) are presented in black and blue/red, respectively, with H-bonded
residues underlined. Hydrophobic residues selected for substitutions
by Gly are highlighted in magenta.