The sequence was first affirmed at IARC Meeting 53 on April 14th 2020, where it was noted:

“The sequence was seen in 1.79% of all unmutated rearrangements, with 11279 sequences including 2138 perfect matches to the inferred allele. There was abundant variation in the CDR3 regions of the aligned sequences. The IGLV10-54*01 allele was also present in the genotype, at a similar frequency (1.77% of all unmutated sequences; 7826 sequences; 2117 unmutated sequences). Haplotype data is unavailable. Plots of the final 3’ nucleotides showed a high level of variability, making it impossible to determine the final three nucleotides with certainty. The sequence, up to and including nucleotide 339, was affirmed as a Level 1 sequence. Uncertainty regarding nucleotides 340-341 will be indicated in IARC and OGRDB publications by two dots at the end of the affirmed sequence.”