| 单词 | promoter | 
| 释义 | promoter [prǝ`mōd·ǝr]  CHEMISTRY A chemical which itself is a feeble catalyst, but greatly increases the activity of a given catalyst.  GENETICS The site on deoxyribonucleic acid to which ribonucleic acid polymerase binds preparatory to initiating transcription of an operon.  | 
	
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