. High nitrogen: 0 mM Ca(NO~0~)~0~; Low nitrogen: 00 µM Ca(NO~0~)~0~. Bars denote the SE of the mean. ns: not significant (*p* \> 0.00); \*, \*\* and \*\*\*: significant at *p* \< 0.00, 0.00 and 0.000, respectively.](ijms-00-00000-g000){#ijms-00-00000-f000}  ![Sign