This inferred allele was assessed at IARC meeting 100 on June 8th, 2022. IGHV4-30-4*01_A70G_A107G was inferred in subject S38 (VDJ-base: P1_I41_S1). The genotype carried no other allele of IGHV4-30-4. The inference was supported by a relative large number of sequences (388) and unmutated sequences (337), a high overall frequency in the unmutated population (0.95%) and a large and diverse set of unique CDR3s (324) in the unmutated sequence set. Its allelic ratio was 100%. Haplotyping based on allelic diversity in IGHJ6 was possible. All reads were associated to one haplotype, a haplotype that also carried IGHV4-30-2, IGHV3-30-3, and IGHV4-31. IARC affirms the sequence at level 1 up to and including base 319 in agreement with past practice. It is acknowledged that the allele most likely carries one additional base, typically A at base position 320. A trailing “.” indicates IARC’s opinion that the sequence is likely to contain one additional 3’-nucleotides for which there is insufficient evidence to make an affirmation. The allele is given the name IGHV4-30-4*i02.

Additional information for this sequence was imported into OGRDB via bulk update with the following notes:
Sequence annotation is based on Genbank sample OW151139
VDJbase example haplotype: P1_I41
One nucleotide truncation at 3’ end