TCDB is operated by the Saier Lab Bioinformatics Group

9.B.315.  The Glycoslyphosphatidylinositol (GPI) Membrane Anchoring Protein GWT1 (GWT1) Family 

This family consists of proteins that modify and anchor proteins to the membrane of Eukaryotes using a GPI anchor. The proteins variy in size and numbers of TMSs with the longer ones having more TMSs.