ZIP Zinc transporter. The ZIP family consists of zinc transport proteins and many putative metal transporters. The main contribution to this family is from the Arabidopsis thaliana ZIP protein family these proteins are responsible for zinc uptake in the plant. Also found within this family are C. elegans proteins of unknown function which are annotated as being similar to human growth arrest inducible gene product, although this protein in not found within this family.

Fe(2+) transport protein

ZIP zinc/iron transport family. The Zinc (Zn2+)-Iron (Fe2+) Permease (ZIP) Family (TC 2.A.5)Members of the ZIP family consist of proteins with eight putative transmembrane spanners. They are derived from animals, plants and yeast. Theycomprise a diverse family, with several paralogues in any one organism (e.g., at least five in Caenorabditis elegans, at least five in Arabidopsis thaliana and two inSaccharomyces cervisiae. The two S. cerevisiae proteins, Zrt1 and Zrt2, both probably transport Zn2+ with high specificity, but Zrt1 transports Zn2+ with ten-fold higher affinitythan Zrt2. Some members of the ZIP family have been shown to transport Zn2+ while others transport Fe2+, and at least one transports a range of metal ions. The energy source fortransport has not been characterized, but these systems probably function as secondary carriers [Transport and binding proteins, Cations and iron carrying compounds].

beta-1,3-galactosyltransferase; Provisional

Galactosyltransferase. This family includes the galactosyltransferases UDP-galactose:2-acetamido-2-deoxy-D-glucose3beta-galactosyltransferase and UDP-Gal:beta-GlcNAc beta 1,3-galactosyltranferase. Specific galactosyltransferases transfer galactose to GlcNAc terminal chains in the synthesis of the lacto-series oligosaccharides types 1 and 2.