ZnT5 transports zinc into secretory granules in pancreatic beta cells Authored: Jassal, B, 2009-09-11 Edited: Jassal, B, 2009-08-21 Pubmed11904301 Reactome Database ID Release 43437085 Reactome, http://www.reactome.org ReactomeREACT_20545 Reviewed: He, L, 2009-11-12 The human gene SLC30A5 encodes the zinc transporter ZnT5. This protein is widely expressed but is most abundant in pancreatic beta cells (Kambe T et al, 2002). In these cells, ZnT5 mediates the transport of zinc into secretory granules that contain insulin.