TCDB is operated by the Saier Lab Bioinformatics Group

9.B.336.  The Lokiarchaeum-specific 4 TMS Membrane Protein (L4MP) Family 

L4MP family members are of about 140 - 160 aas in length and have 4 (or maybe 5 with an extra small N-terminal TMS.  They are found only in Lokiarcheaa.