character: Dr. Emily Johnson
topic: Cell Signaling and Communication
grade: 9
subject: Biology
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character: Dr. Lisa Chen
topic: Cell Communication Mechanisms
grade: 9
subject: Biology
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character: Dr. Mark Thompson
topic: Signal Transduction Pathways
grade: 9
subject: Biology
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character: Dr. Sarah Lee
topic: Intercellular Communication
grade: 9
subject: Biology
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