Members of this family, including VF_A0006 of Vibrio fischeri, PSPA7_2531 of Pseudomonas aeruginosa, and BPSL3341 from Burkholderia pseudomallei, have an N-terminal signal peptide and four invariant Cys residues suggesting the formation of two disulfide bonds. The function is unknown.
Jiyao W et al.(2023). "The conserved domain database in 2023.",