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MS-MS of the cryptococcal AA metabolite. MS-MS was performed on the 4.1-min peak found for the C. neoformans-plus-AA sample and a PGE2 standard. (A) Fragmentation pattern of the m/z 351.2 peak from C. neoformans-plus-AA samples. (B) Fragmentation pattern of the m/z 351.2 peak from the PGE2 standard (Std.).
