9.B.264.  The Uncharacterized Archaeal/Bacterial Protein-11 (UBP11) Family 

This family consists of uncharacterized proteins of 340 - 660 aas and 10 - 15 TMSs from a wide range of archaea and bacteria. This family may be distantly related to 9.B.97 and/or 9.B.263, but this possibility has not been established.