____________________ is a group of proteins that normally circulate in the blood in an inactive form and are activated by contact with nonspecific antigens such as foreign blood cells or bacteria.

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The Answer of ____________________ is a group of proteins that normally circulate in the blood in an inactive form and are activated by contact with nonspecific antigens such as foreign blood cells or bacteria.

____________________ Is a Group of Proteins That Normally Circulate in the Blood