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MS/MS fragmentation spectrum of glycocholate in control and PAH lung. Representative negative ion is selected ion chromatogram (SIC) for glycocholate (m/z 464.4) in normal (NL) and pulmonary hypertension (PAH) lung tissue (top panel). Glycocholate compound identification relied on confirmed experimental MS/MS fragmentation spectrum matched to the authenticated glycocholate standard, run separately (bottom panel)
