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Protein S Antigen, Free

Order Code: 1043

Test Information

This test provides the antigen level of the blood coagulation factor, Protein S. This protein is one of the regulatory proteins in the blood clotting cascade.

Sample Requirements

Citrated Plasma (light blue top)

Additional Sample Requirements

Patient should be off warfarin for at least 1 month before drawing sample.

Shipping Information


Requested Volume

1.5 ml

Minimum/Pediatric Volume

1 ml

CPT Codes




Turnaround Time

7 days


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