9.B.300. The 4 TMS DUF420 (DUF420) Family The proteins of this family have about 140 - 160 aas and 4 TMSs.
Examples:
TC#	Name	Organismal Type	Example
9.B.300.1.1	Uncharacterized protein of 142 aas and 4 TMSs		UP of Lokiarchaeum sp. GC14_75

9.B.300.1.2	Uncharacterized protein of 156 aas and 4 TMSs		UP of Chlamydia abortus

9.B.300.1.3	DUF420 domain-containing protein of 153 aas and 4 TM		DUF420 protein of Planococcus antarcticus