Fig. 7From: Tracing the biosynthetic origin of limonoids and their functional groups through stable isotope labeling and inhibition in neem tree (Azadirachta indica) cell suspensionRelative intensity of salannolacetate isotopologues formed through labeling study with different tracers of Glucose ([1-13C], [2-13C] and [1,6-13C]) and the number of 13C carbon incorporation evident from tandem MS analysis of the isotopologues. (a) MS of salannolacetate isotopologues formed through different 13C Glc feeding experiments (b) MS/MS distribution of isotopologues of the fragments (m/z 85.0648, 245.1538, 419.2214). Heatmap at the left corresponding to isotopologues formed through either [1-13C] or [1,6-13C] Glucose and the one at the right correspond to isotopologues formed through [2-13C] Glc. (M represents the m/z of parent ion of the molecular ion/ fragment)Back to article page