The TRBC2 C-DOMAIN is shown in two different orientations.
Side view (backbone model)
A C-DOMAIN corresponds to the complete C-REGION, to most of the C-REGION, or to part of the C-REGION, depending on the immunoglobulin
or T cell receptor chain type.
This figure shows the C-DOMAIN of a beta chain (PDB: 1bd2_E) of an alpha-beta T cell receptor. Only the C-BETA2, part of the TRB C-REGION, is displayed. The carbohydrates are not shown.
In the PDB file, the sequence includes 17 amino acids of the CONNECTING-REGION of the beta chain, however, the 3D structure only includes C-BETA2 amino acids up to position 247
(according to the IMGT unique numbering for C-DOMAIN and C-LIKE-DOMAIN).
The strands C, F and G are on the external face of C-BETA2. Strands A, B , D and E are on the interface with the C-ALPHA in the alpha-beta T cell receptor.
This image has been generated with the program RASMOL version 2.6  from the PDB file 1bd2 , containing the atomic coordinates of the complexe of a human T cell receptor B7.
 Sayle, R. and Milner-White, E.J. TIBS, 20, 374 (1995).
 Ding, Y.H. et al., Immunity, 8, 403-411 (1998).