Involved in cell wall organization and biosynthesis. Covalently-linked GPI-modified cell wall protein (GPI-CWP), enriched at bud sites and their neighborhood. The number of the intragenic tandem repeats varies between different S.cerevisiae strains. The GPI-anchor is attached to the protein in the endoplasmic reticulum and serves to target the protein to the cell surface. There, the glucosamine-inositol phospholipid moiety is cleaved off and the GPI-modified mannoprotein is covalently attached via its lipidless GPI glycan remnant to the 1,6-beta-glucan of the outer cell wall layer. Probable mannoprotein called haze protective factor from wine that is able to prevent visible wine protein haze formation. This mannoprotein showed haze-protective activity against wine proteins and BSA when either was heated in white wine. Belongs to the SRP1/TIP1 family. Erroneous sequence assembling in the Ser-rich region leading to a longer sequence. Of froth and haze - Issue 78 of January 2007