29457
During translation elongation , the ribosome compositional factors elongation factor G ( EF - G ; encoded by fusA ) and tRNA alternately bind to the ribosome to direct protein synthesis and regulate the conformation of the ribosome .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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