9.B.424. The Uncharacterized 6 TMS Protein (U6P) Family This family includes proteins, usually with ~200 aas and 6 TMSs in a 2 + 2 + 2 TMS arrangement. It seems to be present only in Saccharibacteria, and few members are present in NCBI as of 8/6/2021.
Examples:
TC#	Name	Organismal Type	Example
9.B.424.1.1	Uncharacterized protein of 207 aas and 6 TMSs in a 2 + 2 + 2 TMS arrangement		UP of Candidatus Saccharibacteria bacterium

9.B.424.1.2	Uncharacterized protein of 212 aas and 6 TMSs.		*UP of Pedobacter* sp. (Candidatus Saccharibacteria bacterium (glacier metagenome))**

9.B.424.1.3	Uncharacterized protein of 236 aas and 6 TMSs in a 2 + 2 + 2 TMS arrangement.		UP of candidate division TM7 genomosp. GTL1