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To obtain clues to the normal biological role of DMPK in cellular ion homeostasis , we have compared the resting [ Ca2 + ] i , the amplitude and shape of depolarization - induced Ca2 + transients , and the content of ATP - driven ion pumps in cultured skeletal muscle cells of wild - type and DMPK [ - / - ] knockout mice .
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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:
 None