SLC34A1 and Hypercalciuria: Similarly, in the EG treatment group, the protein products of gene CG3036 and CG5404 work as transmembrane transporter i.e. sodium-phosphate symporter and high affinity sulfate transmembrane transporter, despite that the function of these gene products has not been directly measured Sodium phosphate co-transporter (Npt2a) null mice are shown to have hypercalciuria and hyperphosphaturia, and develop tubular and interstitial Ca phosphate deposits [26].