9.B.290.  The Uncharacterized Prokaryotic Protein of 8 - 11 TMS (UPP8-11) Family

This family consists of medium sized integral membrane proteins with 8 - 11 TMSs.  The first 4 TMSs are of about equal size, but then they continue with (large - small TMSs)_n. These proteins are from archaea and bacteria.