YoaI, a small membrane protein found in Escherchia coli, Salmonella enterica, Citrobacter rodentium, and other members of the Enterobacterales, averages about 34 amino acids in length. The founding member of this family, from Escherichia coli K-12, was shown to be regulated as part of the phosphate regulon.
Jiyao W et al.(2023). "The conserved domain database in 2023.",