. "binding region" . "complementarity determining regions" . . "complementarity-determining regions" . "complementarity-determining region" . "antigen-binding site" . . . "CDR3" . "CDR sequences" . "CDR loops" . "Complementarity-determining region" . "Complementarity Determining Region" . "CDRs" . . "hypervariable loops" . . "complementarity" . . "Complementarity-determining region" .