Members of this protein family, exemplified by YtfJ of Bacillus subtilis, are encoded by bacterial genomes if and only if the species is capable of endospore formation. YtfJ was confirmed in spores of Bacillus subtilis; it appears to be expressed in the forespore under control of SigF (see ). [Cellular processes, Sporulation and germination]
Jiyao W et al.(2023). "The conserved domain database in 2023.",