The description on Sigma-Aldrich's website on DMEM Product Code D5671 states "Dulbecco’s Modified Eagle’s Medium - high glucose with 4500 mg/L glucose and sodium bicarbonate, without L-glutamine and sodium pyruvate, liquid, sterile-filtered, suitable for cell culture, suitable for hybridoma". Does that imply that hybridoma cells are sensitive to L-glutamine and sodium pyruvate?