Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Plot of mean per-amplicon frequency (MPAF) in relation to allelic frequency (here indexed by the number of individuals carrying this allele) for 827 DQB (a) and 706 DRB (b) unique variant sequences, before the stepwise allelic validation procedure
