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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
IGHM IGHM*01 (F) m1 CH1 (1) AY077847 (2) c
CH2
CH3
CH4
M1
M2
IGHD IGHD*01 (F) d1 CH1 (1) AY077847 [1] c
d2.1 CH2 AY077847 [1] c AY077848 [1] (4) c
d3.1 CH3 AY077847 [1] c AY077848 [1] c
d4.1 CH4 AY077848 [1] c AY077847 [1] (3) c
d2.2 CH2D AY077848 [1] c
d3.2 CH3D AY077848 [1] c AY077849 [1] (6) c(m)
d4.2 CH4D AY077848 [1] c AY077849 [1] c(m)
d5 CH5 AY077849 [1] c(m) AY077848 [1] (5) c
d6 CH6 AY077849 [1] c(m)
d7 CH7 AY077849 [1] c(m)
TM M1 AY077849 [1] c(m)
M2 AY077849 [1] c(m)

c: cDNA sequence.
(m) transcript of a membrane chain.

IMGT notes:
  1. (1) By homology with other Teleostei, CH1 mu is spliced to CH1 delta in delta cDNA.
  2. (2) Partial C-REGION: CH1 mu partial in 5'.
  3. (3) Partial C-REGION: CH4 delta partial in 3'.
  4. (4) Partial C-REGION: CH2 delta partial in 5'.
  5. (5) Partial C-REGION: CH5 delta partial in 3'.
  6. (6) Partial C-REGION: CH3D delta partial in 5'.
IMGT references:
  1. [1] Hordvik I., Mol. Immunol., 39, 85-91 (2002). PMID: 12213331
See also (IMGT Scientific chart):