sigma factor

noun
sig·​ma factor | \ ˈsig-mə- How to pronounce sigma factor (audio) \

Medical Definition of sigma factor

: a detachable polypeptide subunit of RNA polymerase that facilitates the initiation of transcription by recognizing specific DNA promoter sites

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sigma factor

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Cite this Entry

“Sigma factor.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/sigma%20factor. Accessed 30 Nov. 2021.

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