Table 1. Tissue-specific expression profile of the TetO-H2B-GFP transgene under control of the original MMTV-tTA(NIH) strain and two novel MMTV-tTA transgenic lines (25754, 25755).
| Line NIH | Line 25754 | Line 25755 | |
| Mammary epithelial cells | * | *** | *** |
| Salivary Gland (epithelial cells) | *** | *** | *** |
| Thymus | *** | No | No |
| Skin | *** | No | No |
| Spleen | *** | No | No |
| Pancreas | ** | No | No |
| Liver | ** | No | No |
| Kidney | * | No | No |
| Heart | * | No | No |
| Lung | * | No | No |
| Intestine | No | No | No |
| Skeletal muscle | No | No | No |
***
high;
**
moderate;
*
low H2B-GFP expression efficiency; No; the tTA-mediated expression of H2B-GFP was undetectable.