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The Novel HLA-DRB4*01:03:49 Allele Was Identified by Next-Generation Sequencing
Although the number of HLA alleles has remarkably expanded to 45421, the HLA-DRB4 locus still shows relatively low diversity, with only 357 alleles according to IPD-IMGT/HLA database (Release 3.65, July 2026) [1]. It has been reported that HLA-DRB4*01:03 is the most frequent HLA-DRB4 allele in the Chinese Han population, with a frequency of 98.11% [2].
Identification of Two Novel HLA-DQB1 Alleles, HLA-DQB1*02:239 and HLA-DQB1*02:271
Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are freely available in the IPD-IMGT/HLA Database. References 1, , , et al., “The IPD-IMGT/HLA Database: Recent Developments in Sequence Submission,” Nucleic Acids Research 54 (2026): D1152–D1158. 2, , , et al., “The Polymorphism of HLA-A, -C-B, -DRB3/4/5, -DRB1, -DQB1 Loci in Zhejiang Han Population, China.
Characterisation of the Novel HLA-DQB1*05:01:56 Allele Using Next-Generation Sequencing in a Chinese Cord Blood Donor
Currently, over 30,894 HLA alleles have been identified in populations around the world, including 3121 alleles for HLA-DQB1 locus according to the latest version of the IPD-IMGT/HLA Database release 3.65 version (July, 2026) [1]. HLA-DQB1*05:01 is a common allele with the frequency of 4.62% in the Chinese Han population [2].
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