A sigma factor (σ factor or specificity factor) is a protein needed for initiation of transcription in bacteria. It is a bacterial transcription initiation...

Anti-sigma factors are small proteins that bind to sigma factors and inhibit transcriptional activity in regulating prokaryote gene expression. Anti-sigma...

Sigma (/ˈsɪɡmə/ SIG-mə; uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In...

m {\displaystyle \operatorname {sinc} {\frac {k}{m}}} is the Lanczos σ factor, which is responsible for eliminating most of the Gibbs phenomenon. It does...

sigma, Sigma, Σ, σ, or ς in Wiktionary, the free dictionary. Sigma (Σ or σ, word-final lowercase ς) is the 18th letter of the Greek alphabet. Sigma may...

transcription factors are necessary for transcription to occur. In bacteria, transcription initiation requires an RNA polymerase and a single GTF: sigma factor. In...

$350 million in cost savings thanks to Six Sigma, which was an important factor in the spread of Six Sigma (this figure later grew to more than $1 billion)...

{\displaystyle \sigma _{c}} ), the Z-factor is defined as: Z-factor = 1 − 3 ( σ s + σ c ) | μ s − μ c | {\displaystyle {\text{Z-factor}}=1-{3(\sigma _{s}+\sigma _{c})...

polymerase, sigma S, also called katF) encodes the sigma factor sigma-38 (σ38, or RpoS), a 37.8 kD protein in Escherichia coli. Sigma factors are proteins...

locus for sigma F, which begins to be expressed in the forespore. In order to prevent sigma F expression in the mother cell, an anti-sigma factor, which...