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Table 1 Summary of CH, D, JH gene segments in the duplicated loci.

From: Evolution of duplicated IgH loci in Atlantic salmon, Salmo salar

CH

D

JH

in EST

comment

IGH-A

Ï„A-1

-

-

no

exon 4 only

Ï„A-2

2

2

no

exon 1 and 2

Ï„A-3

0

2

no

has FS

Ï„A-4

2 (5'); 3 (3') a

2

yes

reverse orientation

Ï„A-5

1

2

yes

 

μ A

6 + 3 b

5

yes

 

δ A

-

-

yes

 

IGH-B

Ï„B-1

-

1

no

has FS

Ï„B-2

2

2

yes

 

Ï„B-3

0

0

 

no exon 1

μ B

6

5

yes

 

δ B

-

-

yes

 
  1. a 5' and 3' relative to the Ï„A-4 gene orientation, which is in reverse orientation compared to the rest of the locus.
  2. b The 3 D sequences are located approximately 20 kb 3' from the 6 D sequences and approximately 13 kb 5' of the J sequences.
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BMC Genomics

ISSN: 1471-2164

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