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Matrix-assisted laser desorption ionization–time of flight (MALDI-TOF) identification of surfactant protein A (SP-A) tryptic peptides in vaginal fluid. A piece of gel corresponding to the spot shown in Fig. 5 was digested with trypsin and peptides were analysed by MALDI-TOF. Of the complete SP-A amino acid sequence depicted, the peptides shown in bold italics and underlined were identified in the trypsinized gel piece.
