While the UDP-GlcNAc-transporter Gl15483 in the ER membrane imports UDP-GlcNAc used for N-glycosylation, the presence of an ER-localized UDP-GlcNAc-4′-epimerase converting UDP-GlcNAc into UDP-GalNAc indicates involvement of the putative GALE enzyme (Gl8382) in producing the UDP-GalNAc monomer for the cyst wall glycan in the ER. This evidence concerns the gene GALE and cyst.