Statistics for the number of sequences contained in the Kabat antibody sequence database.
Only immunoglobulin sequences are stored here; all T-cell receptor, MHC sequences, etc. are rejected. In addition, sequences with fewer than 75 residues are rejected so that the database contains only essentially complete light or heavy chain sequences.
Complete antibodies are those which have both light and heavy chains. These are defined by ensuring the species, sequence name and author details match between the chains. The raw data contains no other pointers to link light and heavy chains to one another.
Previous Releases
1Jan1995
Light chains: 2707
Heavy chains: 3471
Complete antibodies formed: 1294
20Nov1995
Light chains: 3142
Heavy chains: 3947
Complete antibodies formed: 1423
10Feb1996
Light chains: 3138
Heavy chains: 3989
Complete antibodies formed: 1457
18Mar1996
Light chains: 3196
Heavy chains: 4013
Complete antibodies formed: 1478
21Apr1996
Light chains: 3259
Heavy chains: 4038
Complete antibodies formed: 1492
25May1996
Light chains: 3330
Heavy chains: 4137
Complete antibodies formed: 1528
4Jun1996
Light chains: 3353
Heavy chains: 4193
Complete antibodies formed: 1537
28Jun1996
Light chains: 3457
Heavy chains: 4233
Complete antibodies formed: 1546
1Aug1996
Light chains: 3489
Heavy chains: 4318
Complete antibodies formed: 1552
1Oct1996
Light chains: 3544
Heavy chains: 4366
Complete antibodies formed: 1569
7Nov1996
Light chains: 3572
Heavy chains: 4432
Complete antibodies formed: 1595
29Apr1997
Light chains: 3713
Heavy chains: 4517
Complete antibodies formed: 1627
11Nov1997
Light chains: 3858
Heavy chains: 4868
Complete antibodies formed: 1695
28May1999
Light chains: 4493
Heavy chains: 6319
Complete antibodies formed: 1958
9Jul1999
Light chains: 5205
Heavy chains: 7059
Complete antibodies formed: 2030
30Sep1999
Light chains: 5764
Heavy chains: 7720
Complete antibodies formed: 2083
12Jul2000
Light chains: 6014
Heavy chains: 7895
Complete antibodies formed: 2140
Current Release
Note that Kabat has been static since July 2000. Updates here reflect changes to the Kabatman code
5Dec2011
Light chains: 6001 (-0.2% change)
Heavy chains: 7891 (-0.1% change)
Complete antibodies formed: 2137 (-0.1% change)