Fig. 1 | The ISME Journal

Fig. 1

From: Elucidation of glutamine lipid biosynthesis in marine bacteria reveals its importance under phosphorus deplete growth in Rhodobacteraceae

Fig. 1

Characterisation of glutamine lipid from Ruegeria pomeroyi DSS-3 cultures by mass spectrometry in negative ion mode. a Mass spectrum showing molecular ions detected in the peak eluting between 9.6 and 9.8 minutes. The most abundant ion, with m/z 717, was selected for further fragmentation (b, c). After a first round (MS2) of fragmentation (b), the major ion with m/z 435 was consistent with a loss of an 18:1 fatty acid. This ion was selected for MS3 fragmentation (c), which yielded diagnostic ions with m/z 145 and 127, corresponding to glutamate and to an ion resulting from the cyclisation of glutamate following loss of water, respectively

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