LFG3, or Transmembrane BAX inhibitor motif containing 1, is a human gene encoded by TMBIM1. It may also be known as: Protein lifeguard 3; Transmembrane BAX inhibitor motif-containing protein 1; Protein RECS1 homolog; MST100; MSTP100; PP1201; RECS1. The encoded protein has an amino acid length of 311 and a mass of 34.6 kDa. LFG3 is a member of the BI1 family, LFG subfamily. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.