Large family of predicted secreted proteins mostly from CFG group, but also from Burkholderia, Pseudomonas and Streptomyces. Function of these proteins is not known. A 3D structure of a representative of this family from Bacteroides uniformis was solved by JCSG and deposited to PDB as 4ghb. There is some overlap with RHS-repeat (PF05593) family despite lack of obvious repeats in the structure.