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TfR HFE stoichiometry ( 2 1 ) differs from TfR transferrin stoichiometry ( 2 2 ) , implying a different mode of binding for HFE and transferrin to TfR , consistent with our demonstration that HFE , transferrin , and TfR form a ternary complex .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
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