Why there are more IMGT/LIGM references for a V gene than EMBL-Bank source references?
The source references from the EMBL-Bank are selected by the VBASE2 generation procedure. As this procedure is completely automated it needs to be very strict and requires the proper recognition of J elements and RSS sites. This limits the number of EMBL-Bank source references, whereas all IMGT/LIGM sequences with a 100% match to the V gene sequence are shown.