Table 2. Human ZIP proteins.

Protein	Sub-family	Major location of protein expression	Subcellular localization
ZIP1	ZIPII	Prostate, small intestine, kidney, liver, pancreatic α cells29,44,45,46	Plasma membrane, ER46,47
ZIP2	ZIPII	Prostate, uterine, epithelial cells, ovary liver, skin48,49	Plasma membrane50,51
ZIP3	ZIPII	Testes, pancreatic cells52	Plasma membrane53
ZIP4	LIV-1	Small intestine, stomach, colon, cecum, kidney, pancreatic β cells29,54	Plasma membrane55
ZIP5	LIV-1	Liver, kidney, spleen colon, pancreas56	Plasma membrane56
ZIP6	LIV-1	Testis, pancreatic β cells57,58	Plasma membrane57
ZIP7	LIV-1	Brain, liver, pancreatic β cells58,59	Golgi, ER60
ZIP8	LIV-1	Pancreas, placenta, lung, liver, testis, thymus, red blood cells57,61,62	Plasma membrane, lysosome, endosomes61
ZIP9	ZIPI	Prostate63	Golgi64
ZIP10	LIV-1	Testis, kidney, breast, pancreatic α cells, red blood cells29,57,62,65,66	Plasma membrane57,67
ZIP11	gufA	Mammary gland, testis, stomach, ileum and cecum68,69	Golgi68
ZIP12	LIV-1	Neurons, endothelial, smooth muscle and interstitial cells70,71	Unknown
ZIP13	LIV-1	Retinal pigment epithelial cell line, osteoblasts27,72	ER73
ZIP14	LIV-1	Liver, heart, placenta, lung, brain, pancreatic α cells29,74	Plasma membrane, mitochondria, endosome, lysosome75,76