This domain is found as the N-terminal fifty amino acids of a number low-complexity proteins that often bear little or no similarity to each other elsewhere in the protein. The domain occurs twice in Mycobacterium tuberculosis strain H37Rv, in two adjacent proteins, Rv0340 and the isoniazid inducible protein IniB (Rv0341).
Jiyao W et al.(2023). "The conserved domain database in 2023.",