Overview of stored samples per participant in the TransplantLines biobank
| Sample | Colour code | Tube size | n | Temperature |
| Serum | Red | 1500 µL | 4 | −80°C/−112°F |
| EDTA plasma | Purple | 1500 µL | 6 | −80°C/−112°F |
| Buffy coat | Purple | NA | 1 | −80°C/−112°F |
| Blood with RBC | Purple | 1500 µL | 2 | −80°C/−112°F |
| Lithium-heparin | Green | 1500 µL | 4 | −80°C/−112°F |
| Citrate | Blue | 500 µL | 4 | −80°C/−112°F |
| PAXgene | Transparent | 2.5 mL | 1 | −80°C/−112°F |
| 24-hour urine | Yellow | 1500 µL | 6 | −80°C/−112°F |
| Acidified 24-hour urine | Yellow | 2000 µL | 2 | −80°C/−112°F |
| Faeces | Black | 20 mL | 1 | −80°C/−112°F |
| Nails | Purple | 0.5 µL | 1 | −80°C/−112°F |
| Hair | Purple | 2000 µL | 1 | −80°C/−112°F |
NA, not applicable; RBC, red blood cell.