Definitions of the CDR and FWR, according to the IMGT unique numbering scheme.
A RegionDefinition object containing:
IMGT_V
: Grouped CDR and FWR V-segment regions excluding CDR3.
IMGT_V_BY_REGIONS
: Individual CDR and FWR V-segment regions excluding CDR3.
Lefranc MP, et al. IMGT unique numbering for immunoglobulin and T cell receptor variable domains and Ig superfamily V-like domains. Developmental and comparative immunology. 2003 27:55-77.