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On the foundation of a database of genomesequences and protein analyses, the ability to clone a genebased on a peptide analysis is becoming more feasible andeffective for identifying a specific gene and its proteinproduct of interest. As such, the current study conducted aprotein analysis using 2-D PAGE followed by MALDI-TOFand ESI-MS to identify a highly expressed gene product of C.parasitica. A distinctive and highly expressed protein spotwith a molecular size of 47.2 kDa was randomly selected andMALDI-TOF MS analysis was conducted. A homologysearch indicated that the protein appeared to be a fungalenolase (eno1). Meanwhile, multiple alignments of fungalenolases revealed a conserved amino acid sequence, fromwhich degenerated primers were designed. A screening of thegenomic l library of C. parasitica, using the PCR ampliconas a probe, was conducted to obtain the full-length gene,while RT-PCR was performed for the cDNA. The E. coliexpressedeno1 exhibited enolase enzymatic activity, indicatingthat the cloned gene encoded the C. parasitica enolase.Moreover, ESI-MS of two of the separated peptides resolvedfrom the protein spot on 2-D PAGE revealed sequencesidentical to the deduced sequences, suggesting that the clonedgene indeed encoded the resolved protein spot. Northern blotanalysis indicated a consistent accumulation of an eno1transcript during the cultivation.

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