480
Basal level expression was reduced to 20 and 50 % when the UGA stop codon was replaced by UAG or UAA , respectively , consistent with the finding that in E . coli translation terminates more efficiently at UAG and UAA than at UGA .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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