Table 1. Rat embryonic stem cell derivation efficiency.
| Strain | Oxygen (%) | Outgrowths | Established Lines | Efficiency (%) |
| SD | 21 | 13 | 13 | 100 |
| F344 | 21 | 10 | 7 | 70 |
| F344 | 2 | 11 | 10 | 91 |
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