Table 1.
Organization of terrestrial vertebrate Igf2 genes
Length is given in base pairs.
| Species | Exon 1 | Intron 1 | Exon 2 | Intron 2 | Exon 3 | Intron 3 | Exon 4 | Length |
|---|---|---|---|---|---|---|---|---|
| Chicken (G. gallus) | 568 | 5601 | 166 | 6420 | 167 | 740 | 2840 | 16,499 |
| Turkey (M. gallopavo) | 271a | 166 | 8484 | 167 | 714 | 2379 | 11,908 | |
| Duck (A. platyrhynchos) | 464b | <5519 | 166 | 6127 | 167 | 740 | 2286 | 15,448 |
| Zebra finch (T. guttata) | 481 | 8210 | 166 | 6624 | 167 | 445 | 2660 | 18,660 |
| Flycatcher (F. albicollis) | 474b | 7616 | 511 | 7500 | 167 | 450 | 2557 | 19,207 |
| Ch softshell turtle (P. sinensis) | 126 | 18,026 | 163 | 13425 | 167 | 1027 | 2856 | 35,783 |
| Anole lizard (A. carolinensis) | NDc | 163 | 5959 | 167 | 1099 | 3759 | 11,146 | |
| Frog (X. tropicalis) | 180 or 59 | 15,283 or 27,386 | 163 | 6614 | 167 | 969 | 441 | 25,263 or 36,772 |
a Data were found in cDNA and could not be mapped to genomic DNA.
b This is a poor-quality DNA sequence.
c ND indicates no DNA sequence detected.