character: Dr. John Lee
topic: Calcium Ions as Intracellular Messengers
grade: 12
subject: Biology
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character: Professor Sarah Miller
topic: Signaling Pathways in Cells
grade: 12
subject: Biology
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character: Dr. Emily Wang
topic: Role of Ions in Cellular Communication
grade: 12
subject: Biology
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character: Mr. Alex Johnson
topic: Second Messengers in Signal Transduction
grade: 12
subject: Biology
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