This family includes the B. subtilis YphB protein Swiss:P50742, which is functionally uncharacterised. Its expression is regulated by the sporulation transcription factor sigma-F, however it is not essential for sporulation or germination [1]. This is not a homologue of E. coli YphB, which belongs to Pfam:PF01263. This family of proteins is found in bacteria. Proteins in this family are typically between 276 and 300 amino acids in length and contain a conserved YIEGIA motif.

1: Identification of additional genes under the control of the transcription factor sigma F of Bacillus subtilis. Decatur A, Losick R; J Bacteriol. 1996;178:5039-5041. PMID:8759874