Ulta Lab Tests

Protein C Activity and Antigen Test

The Protein C Activity and Antigen Test evaluates both the function and concentration of Protein C, a natural anticoagulant that helps regulate blood clot formation. Measuring protein activity and antigen levels aids in identifying inherited or acquired Protein C deficiency, assessing thrombosis risk, and supporting diagnosis of abnormal coagulation disorders or vitamin K–related conditions.

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The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Protein C, Activity

Protein C, Antigen

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The Protein C Activity and Antigen Test test contains 1 test with 2 biomarkers .

Comprehensive test assesses the total level of protein and its functional activity in determining Protein C deficiency, which is strongly prothrombotic, and may require long-term anticoagulation therapy. In the presence of low Protein C Activity, Protein C Antigen helps to confirm and to classify Protein C Deficiency as Type I or Type II. Protein C is a highly thrombophilic protein.

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