Which of the Following Statements About C3 Is NOT Correct

question 1

Multiple Choice

Which of the following statements about C3 is NOT correct?

• A)C3 contains an internal thioester bond that participates in covalent linkage to cell surfaces.
• B)C3 is the most abundant complement protein in the serum.
• C)A proteolytic fragment of C3 is part of both the C3 and C5 convertases.
• D)Activated C3 is a serine protease that cleaves C4.
• E)C3 in the plasma is spontaneously cleaved into C3b.

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