16027
An alpha - carbonic anhydrase ( CA , EC 4 . 2 . 1 . 1 ) has been identified , cloned , and characterized from the unicellular protozoan Trypanosoma cruzi , the causative agent of Chagas disease .
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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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