Figure 2From: The enteric bacterial metabolite propionic acid alters brain and plasma phospholipid molecular species: further development of a rodent model of autism spectrum disorders Positive ion mass spectra of brain lipid extract. ( A) Full ion scan of all lipids present in positive ion mode. ( B) Detection of [M + H]+ ions of PC and SM molecular species by precursor scanning of m/z 184. IS, internal standard; PC, phosphatidylcholine; SM, sphingomyelin.Back to article page