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(a) MALDI image of TIC of heart tissue section spotted with 5 nmol of PE 16:0/18:1 (PE spot), 5 nmol of PC 16:0/18:1 (PC spot), and 5 nmol each of PE 16:0/18:1and PC 16:01/18:1 (PE+PC spot) in negative ion mode with AgNPs. Average mass spectra of (b) PE spot, (c) PC spot, and (d) PE+PC spot
