Skip to main content
. Author manuscript; available in PMC: 2009 Sep 23.
Published in final edited form as: Proc IEEE Inst Electr Electron Eng. 2005 Apr 1;93(4):784–799. doi: 10.1109/JPROC.2005.844266

Fig. 6.

Fig. 6

31P MR spectra of intact perfused cells, acquired in our MR-compatible perfusion system, showing spectra from (a) MCF-12A human mammary epithelial cells and (b) MDA-MB-231 human breast cancer cells. Breast cancer cells exhibit high PC levels, whereas mammary epithelial cells exhibit low PC and high GPC levels. Following peaks are assigned in the 31P MR spectra: GPC, glycerophosphocholine; GPE, glycerophosphoethanolamine; NDP, nucleoside diphosphate; NTP, nucleoside triphosphate; PC, phosphocholine; PCr, phosphocreatine; Pi, inorganic phosphate; PME, phosphomonoesters; PDE, phosphodiesters.