TMP, or Epithelial membrane protein 1, is a human gene encoded by EMP1. It may also be known as: EMP-1; CL-20; Protein B4B; Tumor-associated membrane protein. The encoded protein has an amino acid length of 157 and a mass of 17.6 kDa. TMP is a member of the PMP-22/EMP/MP20 family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.