YIP Superfamily
These proteins usually have 4 - 6 TMSs and function in intracellular protein trafficking in eukaryotes and as protein chaparone proteins in prokaryotes.
9.B.29 -
The 4-5 TMS Putative Chaperone (4-5PC) Family
9.B.135 -
The Membrane Trafficking Yip (Yip) Family