character: Dr. Sarah Johnson
topic: Antigen Presentation and MHC Molecules
grade: 12
subject: Biology
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character: Professor Mark Ramirez
topic: The Role of MHC in Immune Response
grade: 12
subject: Biology
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character: Emily Chen
topic: How Antigen Presentation Affects Immunity
grade: 12
subject: Biology
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character: Dr. Alan Patel
topic: Understanding MHC: Key to Immune System Function
grade: 12
subject: Biology
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