Table 4.
The six most constantly expressed genes detected by cDNA microarray.
| Gene symbol | GeneBank accession no. | Description | Function | No of twin pairs with up-regulated gene expression |
| G1P3 | X02492 | Interferon-induced protein 6–16 | Unknown | 4 |
| POU3F1 | NM_002699 | POU domain, class 3, transcription factor 1 (SCIP/Oct-6) | Serves as transcriptional transactivator in the nucleus | 3 |
| MX2 | M30818 | Myxovirus (influenza) resistance 2 | Possible antiviral potential | 3 |
| LAPTM5 | NM_006762 | Lysosomal-associated multispanning membrane protein-5 | Possible involvement in B cell activation | 3 |
| HBA2 | NM_000517 | Hemoglobin, alpha 2 | Oxygen transport | 3 |
| HBB | NM_000518 | Hemoglobin, beta | Oxygen transport | 3 |