Plotting Calibration Curve Using Biosynthetic Specifically Labeled   Compounds for Accurate Mass Isotopomer Analysis
  This paper has been withdrawn by the author(s), due to the requirement of the journal it currently submitted to 
Tie Shen, Ying Xiong, Haoran Zheng, Xiaosong Pan, Rui Bin, Jianping   Liu, Jihui Wu, Weiqun Shen