We have access to cynomolgus macaques that have been pedigreed for eight generations, and the origin of the animals was determined based on mtDNA analyses. In an earlier study, we showed that the Mafa-A alleles are mostly unique for this population. Hence, a unique set of Mafa-B alleles is expected to be present in the same animals. The question is whether these B-alleles segregate in a stable linkage to the already described Mafa-A sequences in these animals. Should this be the case, MHC typing on this cohort may be then performed using less cumbersome techniques: for instance, those based on microsatellite or SNP analyses.