وفر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
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تسمى أيضاً الغلوبولينات المناعية، وهو بروتينات وقائية تنتجها الخلايا المناعية البائية للجسم استجابةً لوجود مادة أو جسم غريب، يُسمى المستضد، مثل المواد السامة أو الفيروسات. تتعرف الأجسام المضادة على المستضدات وتلتصق بها لتخلص الجسم منها؛ وفي هذه الحالة تتكاثر الخلايا البائية بكثرة لتولد عدداً كافياً من الجسيمات المضادة، وبالتالي تخليص الجسم من المادة الغريبة التي دخلت إليه.
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