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In this work , Family 1 cellulose binding modules CBMCel7A and CBMCel6A were heterologously expressed and purified from Escherichia coli , and the binding properties between these CBMs and cellulose substrates were studied .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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