The SraB RNA is a small non-coding RNA

Non-coding RNA

A non-coding RNA is a functional RNA molecule that is not translated into a protein. Less-frequently used synonyms are non-protein-coding RNA , non-messenger RNA and functional RNA . The term small RNA is often used for short bacterial ncRNAs...

 discovered in E. coli during a large scale experimental screen. The 14 novel RNAs discovered were named 'sra' for small RNA, examples include SraC

SraC/RyeA RNA

The SraC/RyeA RNA is a non-coding RNA that was discovered in E. coli during two large scale screens for RNAs. The function of this RNA is currently unknown. This RNA overlaps the RyeB RNA on the opposite strand suggesting that the two RNAs may act in a concerted manner....

, SraD

SraD RNA

The MicA RNA is a small non-coding RNA that was discovered in E. coli during a large scale screen. Expression of SraD is highly abundant in stationary phase, but low levels could be detected in exponentially growing cells as well....

 and SraG

SraG RNA

SraG is a is a small non-coding RNA . It is the functional product of a gene which is not translated into protein.This ncRNA was discovered in the bacteria Escherichia coli during a large scale computational screen for transcription signals and genomic features of known small RNA-encoding genes...

. This ncRNA was found to be expressed only in stationary phase

Stationary phase

The term stationary phase may refer to* Stationary phase , a phase in bacterial growth* Stationary phase , a medium used in chromatography* Stationary phase approximation in the evaluation of integrals in mathematics...

. The exact function of this RNA is unknown but it has been shown to affect survival of Salmonella enterica

Salmonella enterica

Salmonella enterica is a rod-shaped flagellated, facultative anaerobic, Gram-negative bacterium, and a member of the genus Salmonella.- Epidemiology :...

to antibiotic administration in egg albumin. The authors suggest this may be due to SraB regulating a response to components in albumin.