Selectable Marker Genes in Vectors used for Gene Transfer.
Selectable marker gene |
Substrate used for selection |
I. Antibiotics. |
|
1. Neomycin phosphotransferase (npt ll) |
G4I8, kanamycin, neomycin |
2. Hygromycin phosphotransferase (hpt) |
Hygromycin B |
3. Dihydrofoate reductase (dhfr) |
Methotrexate trimethoprim |
4. Gene ble (enzyme not known) |
Bleomycin |
5. Gentamycin acetyltransferase |
Gentamycin |
6. Streptomycin phosphotransferase |
Streptomycin |
II. Herbicides |
|
7. Mutant form of acetoiactate synthase (als) |
Chlorosulfuron imidazolinones |
8. Bromoxynil nitrilase |
Bromoxynil |
9. Phosphinothricin acetyl transferase (bar) |
L -phosphinothricin (PPT; also known as bialaphos) |
10. 5- enolpyruvyishikimate -3 -phosphate (EPSP) synthase (aro A) |
Glyphosate (Roundup) |
III. Others |
|
II. Phosphomannose isomerase (pmi) |
Mannose |


