Figure 1From: Ex-vivo HRMAS of adult brain tumours: metabolite quantification and assignment of tumour biomarkersTOCSY showing GPE cross peak. A region of a TOCSY spectrum from a GBM sample showing the cross peak assignment of GPE. Cross peaks are indicated for selected metabolites; the GPE resonance is at 3.3 ppm in the direct dimension and 4.1 ppm in the indirect dimension.Back to article page