In the cohort of 115 cynomolgus macaques, three to eight different Mafa-B sequences per animal were detected, with varying levels of transcription. The sequences, of which at least three identical clones were present, were reported as alleles. In most cases, these alleles were also confirmed in different animals. In total, 69 Mafa-B alleles were present, of which 16 were previously described by other research groups (Uda et al. 2005; Lafont et al. 2007; Pendley et al. 2008; Wu et al. 2008; Campbell et al. 2009; Kita et al. 2009 ). The other 53 sequences have been submitted to EMBL-EBI and to the MHC-NHP database (Robinson et al. 2003) , and have been catalogued. A list of the Mafa-B alleles is provided, including the accession numbers, and the reference animals (Table 1) .