character: Dr. Emily Johnson
topic: Overview of Signal Transduction Pathways
grade: 12
subject: Biology
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character: Dr. Sarah Lee
topic: Mechanisms of Cellular Communication
grade: 12
subject: Biology
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character: Professor Mark Williams
topic: Role of Receptors in Cell Signaling
grade: 12
subject: Biology
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character: Dr. Karen Mitchell
topic: Intracellular Signaling Cascades
grade: 12
subject: Biology
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