This family contains proteins found in eukaryotes, including human Transmembrane protein TMEM254 (C10orf57). The exact function of this protein is still unknown, however it is thought to be an integral membrane protein. The protein sequence is 123 amino acids in length and has a mass of approximately 14.2 kDa. The family also includes some longer proteins that possess an N-terminal dehydrogenase domain, Pfam:PF01073.