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We have used charybdotoxin , a known inhibitor of Ca(2+)-dependent K+ channels , to study the role of these channels in lymphocyte activation and mitogenesis .
 protein: Ca(2+)-dependent K+ channels
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: Ca(2+)-dependent K+ channels