 Cadmium has no known function in higher organisms , but a cadmium @-@ dependent carbonic anhydrase has been found in some marine diatoms . The diatoms live in environments with very low zinc concentrations and cadmium performs the function normally carried out by zinc in other anhydrases . This was discovered with X @-@ ray absorption fluorescence spectroscopy ( XAFS ) . 
 Cadmium <a href='got' title='1'><mark>has</mark></a> no known function in higher organisms , but a cadmium @-@ dependent carbonic anhydrase <a href='been_done' title='2'><mark>has</mark></a> been found in some marine diatoms . The diatoms live in environments with very low zinc concentrations and cadmium <a href='uninflect' title='3'><mark>performs</mark></a> the function normally carried out by zinc in other anhydrases . This was discovered with X @-@ ray absorption fluorescence spectroscopy ( XAFS ) . 
Cadmium got no known function in higher organisms , but a cadmium @-@ dependent carbonic anhydrase done been found in some marine diatoms . The diatoms live in environments with very low zinc concentrations and cadmium perform the function normally carried out by zinc in other anhydrases . This was discovered with X @-@ ray absorption fluorescence spectroscopy ( XAFS ) .