Alleles identical in sequence in exons 2+ 3 cannot be distinguished.Frequency is given under the first allele e.g frequency for B*0705/B*0706 is given under B*0705.Consult IMGTd/base for list of undistinguishable alleles
Allele frequency net 2015 update:
new features for HLA epitopes, KIR and disease and HLA adverse drug reaction associations.
Gonzalez-Galarza FF, Takeshita LY, Santos EJ, Kempson F, Maia MH, Silva AL, Silva AL, Ghattaoraya GS, Alfirevic A, Jones AR and
Middleton D Nucleic Acid Research 2015, 39, 28, D784-8.