Government on Sunday said Mahyco, the developers of Bt brinjal, has been asked to deposit the seed stock with the National Bureau of Plant Genetics Resources to prevent any potential leakage and contamination till its safety is proved. ”There is no chance of Bt brinjal making a backdoor entry through leakages of its seeds till it is cleared by an independent regulatory body,” Environment Minister Jairam Ramesh told the Rajya Sabha.