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Identification of sphingolipid species containing 2-OH PA in 3T3-L1 adipocytes. A, B: Total Cer (A) and 2-OH Cer (B) molecular species were fingerprinted by NL scanning of m/z 256 (A) or 327 (B) in the negative-ion mode by ESI-MS/MS. C: SM molecular species were fingerprinted by NL scanning of m/z 213 in the positive-ion mode by ESI-MS/MS. D: HexCer molecular species were fingerprinted by precursor ion scanning of m/z 264 in the positive-ion mode by LC ESI-MS/MS.
