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Spot 454 was identified as hypoxia up-regulated 1 precursor (HYOU1) by using matrix-assisted laser desorption/ionization time of flight (MADLI-TOF/TOF), respectively. A) The peptide mass fingerprinting and LIFT analysis of spot 454, which was carried out using MADLI-TOF/TOF. B) Spot 454 was identified as HYOU1 through using Mascot search.
