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Paper text:
nucleotide substitutions found after comparison of each new allele 's sequence with their most homologous allele 
 table s2 .
origin and hla phenotypes of potential stem cell donors carrying new hla alleles 
 table s3 .
broad ethnic categories used to classify ethnicity data from potential donors registered with dkms in the united states click here for additional data file .
abstractwe characterized 549 new human leukocyte antigen ( hla ) class i and class ii alleles found in newly registered stem cell donors as a result of highthroughput hla typing . 
 new alleles include 101 hlaa , 132 hlab , 105 hlac , 2 hladrb1 , 89 hladqb1 and 120 hladpb1 alleles . mainly , new alleles comprised single nucleotide variations when compared with homologous sequences . 
 we identified nonsynonymous nucleotide mutations in 70.7% of all new alleles , synonymous variations in 26.4% and nonsense substitutions in 2.9% ( null alleles ) . 
 some new alleles ( 55 , 10.0% ) were found multiple times , hladpb1 alleles being the most frequent among these . 
 furthermore , as several new alleles were identified in individuals from ethnic minority groups , the relevance of recruiting donors belonging to such groups and the importance of ethnicity data collection in donor centers and registries is highlighted .