9.B.400. The Uncharacterized Prokaryotic Membrane Protein-6 (UPMP6) Family Members of this family have about 120 to 150 aas with 4 TMSs. They occur in bacteria and archaea.
Examples:
TC#	Name	Organismal Type	Example
9.B.400.1.1	Uncharacterized protein of 145 aas and 4 TMSs.		UP of Candidatus Prometheoarchaeum syntrophicum

9.B.400.1.2	Uncharactereized protein of 124 aas and 4 TMSs		*UP of gamma proteobacterium symbiont of Ctena orbiculata* (mollusc metagenome)**

9.B.400.1.3	Uncharacterized protein of 131 aas and 4 TMSs		UP of Flavobacteriaceae bacterium A100

9.B.400.1.4	Uncharacterized protein of 130 aas and 4 TMSs		UP of Calditrichaeota bacterium (hydrothermal vent metagenome)

9.B.400.1.5	Uncharacterized protein of 135 aas and 4 TMSs		UP of Candidatus Rokubacteria bacterium GWA2_70_23 (subsurface metagenome)