This sequence represents IGHV1-58*01+G33A in the IMGT numbering system. The committee noted a rearrangement frequency of 0.15%, with 178 alignments including 127 perfect matches to the inferred allele. There was abundant variation in the CDR3 regions of the aligned sequences. The genotype showed the individual to be heterozygous at the IGHV1-58 locus, with the alternative IGHV1-58*01 allele being associated with 214 sequences for an allele ratio of 45:55. This sequence has previously been catalogued by IgPdb as IGHV1-58*p04, though the IgPdb sequence is derived from the S0008 dataset. All members of the committee agreed that the sequence should be accepted as a Level 1 sequence at IARC Meeting 34 on March 29, 2019. In line with previous policy, the submitted sequence will be recognized up to and including nucleotide 319. A trailing “.” indicates IARC’s opinion that the sequences likely to contain an additional/additional 3’ nucleotide(s) for which there is insufficient evidence to make an affirmation.