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These involve activation of the sodium/proton exchanger of the cell membrane at very low, physiological concentrations of aldosterone with an acute onset within 1-2 min.
 protein: sodium/proton exchanger
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: sodium/proton exchanger