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"+" or "-" indicates if the gene sequences have been found (+) or not been found (-) rearranged (R), transcribed (T) and/or translated into protein (Pr). Arbitrarily that information is shown on the first line of each gene when the data have been confirmed by several studies.

Functionality is shown between parentheses, (F) and (P), when the accession number refers to rearranged genomic DNA or cDNA and the corresponding germline gene has not yet been isolated.
Functionality is shown between brackets, [F] and [P], when the accession number refers to genomic DNA, but not known as being germline or rearranged.

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IMGT gene name IMGT allele name Fct Chromosomal localization R T Pr Positions in the locus IMGT/LIGM-DB reference sequences IMGT/LIGM-DB sequences from the literature
Clone names Accession numbers Positions in the sequence (J-GENE-UNIT) Secondary accession numbers Clone names Accession numbers Positions in the sequence (J-GENE-UNIT)
IGHJ1 IGHJ1*01 F 7q BK009101 [1] 66-156
IGHJ2 IGHJ2*01 ORF (1) 7q BK009102 [1] 66-157
IGHJ3 IGHJ3*01 F 7q BK009103 [1] 67-155
IGHJ3P IGHJ3P*01 P (2) 7q BK009107 [1] 66-151
IGHJ4 IGHJ4*01 F 7q BK009104 [1] 68-154
IGHJ5 IGHJ5-1*01 F 7q BK009105 [1] 67-156
IGHJ5-2*01 F 7q BK009106 [1] 67-156
IGHJ6 IGHJ6*01 F 7q BK009108 [1] 66-157
IMGT notes:
  1. (1) noncanonical J-HEPTAMER
  2. (2) potential frameshifts in J-REGION, not found rearranged in cDNA sequence
IMGT references:
  1. [1] Yu et al., Immunogenetics, 68(6-7), 417-428(2016). PMID: 27233955
See also (IMGT Scientific chart):