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Optical density (OD) ratios and DNA yield (μg) per 500 μL of blood extracted by the three protocols respectively. ST1 and ST2 denote Standard Protocol 1 and 2 respectively. Both OD ratios and DNA yield were expressed as mean±SD
| Experimental protocol | ST1 | ST2 | ||||
|---|---|---|---|---|---|---|
| Fresh | Frozen | Fresh | Frozen | Fresh | Frozen | |
| OD260/OD280 ratio | 1.88±0.07 | 1.86±0.06 | 1.96±0.03 | 1.90±0.05 | 1.72±0.11 | 1.7±0.09 |
| Yield (μg) per 500 mL | 22±2.97 | 20.5±3.97 | 19.5±3.95 | 17±2.12 | 25.2±3.32 | 24±4.28 |
