complement protein
(KOM-pleh-ment PROH-teen)
One of a group of about 20 proteins that is found in the blood and is important in fighting infections and other diseases.
The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.
Updates regarding government operating status and resumption of normal operations can be found at opm.gov.