Corticosteroid-binding Globulin (CBG) Transcortin
14 days
Radioimmunoassay (RIA)
Accredited Laboratory Partner
Contact Technical Support
Protein that binds cortisol. Affects total cortisol levels.
Serum
1 mL
Red-top tube or gel-barrier tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Strictly frozen, requires own sample container - Separate serum from cells within one hour of collection. Transfer specimen to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
| Temperature | Period |
|---|---|
| Room temperature | 2 days |
| Refrigerated | 2 days |
| Frozen | 300 days |