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The 1 . 3 - kb DNA , when placed upstream of the chloramphenicol acetyltransferase gene , was shown to be functionally active .
 GENE: chloramphenicol acetyltransferase gene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: chloramphenicol acetyltransferase gene