What's The Normal Blood Group Level For Ra?

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Definition

Complement component 4 is a blood test that measures the activity of a certain protein that is part of the complement system. The complement system is a group of proteins that move freely through your bloodstream. The proteins work with your immune system and play a role in the development of inflammation.

There are nine major complement proteins. They are labeled C1 through C9. This test measures C4.

See also:

  • Complement
  • Complement component 3 (C3)
  • CH50
  • CH100

Alternative Names

C4


How the test... Read more

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