Sigma Chi | Sigma Xi | Sigma Alpha Epsilon | Delta Sigma Theta | Phi Beta Sigma | Sigma Corporation | Sigma Alpha Mu | Sigma Phi Epsilon | Sigma | Kappa Sigma | Beta Gamma Sigma | Tau Beta Sigma | Six Sigma | Sigma Alpha Iota | Phi Sigma Kappa | SK Sigma Olomouc | Sigma SD14 | Sigma Gamma Rho | Phi Sigma Epsilon | Delta Sigma Pi | Sigma Tau Gamma | Sigma Sigma Sigma | Sigma Nu | Sigma Kappa | Phi Kappa Sigma | Lean Six Sigma | Beta Sigma Phi | Alpha Sigma Phi | Alpha Chi Sigma | Team IG-Sigma Sport |
From this set of candidate genes, microarray analysis and northern blotting confirmed the existence of 17 previously undescribed sRNAs, many of which bind to the chaperone protein Hfq and regulate the translation of RpoS (Sigma 38).
The gene rpoS (RNA polymerase, sigma S) encodes sigma-38 (σ38, or RpoS), a 37.8 kD protein in Escherichia coli.