Aldehyde dehydrogenase ALDH21A1 (gene name RNP123) was first described in the moss Tortula ruralis and is believed to play an important role in the detoxification of aldehydes generated in response to desiccation- and salinity-stress, and ALDH21A1 expression represents a unique stress tolerance mechanism. So far, of plants, only the bryophyte sequence has been observed, but similar protein sequences from bacteria and archaea are also present in this CD.
Jiyao W et al.(2023). "The conserved domain database in 2023.",