9.B.332. The Uncharacterized Membrane Protein of 4 TMSs (UMP4) Family This family consists of archaeal proteins with 4 TMSs and a size of about 150 to 200 aas. A function has not been assigned.
Examples:
TC#	Name	Organismal Type	Example
9.B.332.1.1	Uncharacterized protein (UP) of 195 aas with 4 TMSs and a proposed PhoR domain		UP of Lokiarchaeum sp.

9.B.332.1.2	UP of 198 aas and 4 TMSs		UP of a Crenarchaeota group-6 archaeon AD8-1

9.B.332.1.3	UP of 190 aas and 4 TMSs		UP of Methanomassiliicoccus luminyensis