| complementarity determining regions | That part of an antibody or T-cell receptor variable region that binds with antigen or antigen/major histocompatibility molecule. (05 Mar 2000) |
|---|---|
| promoter regions | <genetics> DNA sequences which are recognised (directly or indirectly) and bound by a DNA-dependent RNA polymerase during the initiation of transcription. Highly conserved sequences within the promoter include the pribnow box in bacteria and the tata box in eukaryotes. (12 Dec 1998) |
| hypervariable regions | The regions of the immunoglobulin molecule that contain most of the residues involved in the antibody binding site. (05 Mar 2000) |
| terminator regions (genetics) | DNA sequences which signal the termination of transcription. (12 Dec 1998) |