Summary of the population and DNA sequence data used in this study.

1Number of populations.2The total number of individuals included in the analyses is around 23,500, as many individuals have been simultaneously typed at several loci.3Data loaded from the IMGT official database (release 2.13). In fact, the number of sequences used for the analyses is slightly higher (indicated within brackets) due to the automated conversions to lower levels of resolution (e.g. from 6 to 4 digits) applied to the data, as explained in Materials and methods.4Exons 2 and 3 for class I genes, exon 2 for class II genes.