This family of proteins is functionally uncharacterised. This family of proteins is found in bacteria. Proteins in this family are approximately 70 amino acids in length. There is a conserved YDRNRN sequence motif. The E. coli protein has been shown to bind selenium [1]. This protein shows structural similarity to the KOW motif.

1: Direct detection of potential selenium delivery proteins by using an Escherichia coli strain unable to incorporate selenium from selenite into proteins. Lacourciere GM, Levine RL, Stadtman TC; Proc Natl Acad Sci U S A. 2002;99:9150-9153. PMID:12084818