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Home > Sigma factor

Sigma factor (σ factor) is an initiation factor that binds to RNA polymerase and promotes attachment to promoter sites on DNA.

Structure

Sigma factor has four main regions:

N----------C

1 2 3 4


Molecular genetics

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Topics: Sigma Factor, Sigma algebra, Sigmaringen (district)...

Sigma-algebraIn mathematics, a sigma;-algebra (or sigma;-field X over a set S is a family of subsets of S which is closed under countable set operations; σ-algebras are mainly used in order to define measures on S''. The concept is important in mathematical analSigmaSigma may refer to many things: Sigma (upper case Σ, lower case σ, alternative ς) is a letter in the Greek alphabet. See Sigma (letter). The upper-case letter Σ is used as a symbol for the summation operator forming a series in maSigmaringenSigmaringen is a city in southern Germany, in the state of Baden-Wurttemberg, formerly Hohenzollern, capital of the Sigmaringen district. It was first mentioned in 1077 and is particularly renowned for its wonderfully preserved castle. On September 7, 194
Sigmaringen (district)Sigmaringen is a district Kreis in the south of Baden-Wurttemberg, Germany. Neighboring districts are (from north clockwise) Reutlingen, Biberach, Ravensburg, Bodenseekreis, Constance and Zollernalbkreis. History The area of the district was owned by seveSigma Phi EpsilonSigma;ΦΕ (Sigma Phi Epsilon a social fraternity founded in 1901, has the largest undergraduate numbers of any social fraternity in the United States. It is founded on three principles: virtue, diligence and brotherly love. In 1992, the fraternSigma functionSee divisor function for arithmetic functions σ n , busy beaver for Rado's sigma function.
Sigma-compactnessSigma Phi DeltaSigma (letter)
Sigma 6Sigma factorSigma Nu
Sigma OctantisSigma ChiSigma Tau Gamma
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