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"+" or "-" indicates if the gene sequences have been found (+) or not been found (-) 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 T Pr Positions in the locus IMGT/LIGM-DB reference sequences IMGT/LIGM-DB sequences from the literature
Strain Clone names Exons Accession numbers Positions in the sequence Secondary accession numbers Strain Clone names Accession numbers Positions in the sequence
IGHA1 IGHA1*01 F Ig alpha-1 CH1 X15045 [2] X53703 [3]
H+CH2 (1) X15045 [2] X53703 [3]
CH3(including CHS) X15045 [2] X53703 [3]
M
IGHA1*02 F Ig alpha-1 CH1 X08044 [1] (2)
H+CH2 (1) X08044 [1] (2)
CH3(including CHS)
M
IGHA2 IGHA2*01 F Ig alpha-2 CH1 X53707 [3] X08043 [1] (3)
H+CH2 (1) X53707 [3] X08043 [1] (3)
CH3(including CHS) X53707 [3]
M
IGHG1 IGHG1*01 F IGHG1 CH1 AF300449 [4] (3)
H AF300449 [4] (3)
CH2 AF300449 [4] (3)
CH3(including CHS)
M1
M2
IGHG2 IGHG2*01 F IGHG2 CH1 AF300448 [4] (3)
H AF300448 [4] (3)
CH2 AF300448 [4] (3)
CH3(including CHS)
M1
M2
IGHG3 IGHG3*01 F IGHG3 CH1 AF300447 [4] (3)
H1 AF300447 [4] (3)
H2 AF300447 [4] (3)
CH2 AF300447 [4] (3)
CH3(including CHS)
M1
M2
IGHG4 IGHG4*01 F IGHG4 CH1 AF300446 [4] (3)
H AF300446 [4] (3)
CH2 AF300446 [4] (3)
CH3(including CHS)
M1
M2
IGHGP IGHGP*01 F IGHGP CH1 AF300445 [4] (3)
H AF300445 [4] (3)
CH2 AF300445 [4] (3)
CH3(including CHS)
M1
M2
IMGT notes:
  1. (1) In the IGHA gene, the hinge (H) and CH2 are joined in a single exon.
  2. (2) Partial C-GENE: CH1 is partial in 5' and no CH3.
  3. (3) Partial C-GENE: CH1 is partial in 5' and CH2 is partial in 3'.
IMGT references:
  1. [1] Ueda S. et al., J. Mol. Evol., 27, 77-83 (1988). PMID: 3133489
  2. [2] Kawamura S. et al., Nucleic Acids Res., 17, 6732 (1989). PMID: 2506527
  3. [3] Kawamura S. et al., Mol. Biol. Evol., 8, 743-752 (1991). PMID: 1775062
  4. [4] Fortenfant F. et al., Unpublished (2002).
See also (IMGT Scientific chart):