This family consists of exoribonuclease II, the product of the rnb gene, as found in a number of gamma proteobacteria. In Escherichia coli, it is one of eight different exoribonucleases. It is involved in mRNA degradation and tRNA precursor end processing. [Transcription, Degradation of RNA]
Jiyao W et al.(2023). "The conserved domain database in 2023.",