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Constructs containing the full - length PfCPK cDNA have been expressed in Escherichia coli at a high level to generate a 60 - kDa recombinant protein .
 full - length PfCPK cDNA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 full - length PfCPK cDNA