Table 1. Summary of clustering dataset contents.

Total clustered members per CDR include outliers and singletons.

Total PDB files	1,351
Files containing structures from two antibodies/idiotypes-anti-idiotypes	8/5
Total antibody structures	1,359
Total number of CDRs	13,086
CDRs with missing Cα coordinates	374
Total clustered CDRs	12,712
CDR-L1 clustered	2,155
CDR-L2 clustered	2,174
CDR-L3 clustered	2,164
CDR-H1 clustered	2,057
CDR-H2 clustered	2,130
CDR-H3 clustered	2,032
Total non-redundant CDR sequences	2,827
PDB files with lambda isotypes	194
Heavy only	77
Light only	78
PDB files with bound antibodies	673