SLC30A2 and zinc deficiency, transient neonatal: The G87R mutant found in the ExAC database served as a bona fide LoF control as it was previously shown to cause TNZD.16, 46 In addition to the 29 missense mutations that we tested for zinc function, we also studied the in‐frame deletion of three nucleotides which resulted in deletion of residue E213 in ZnT2.