Gibberellin-regulated protein (GRP) is a fruit severe allergen. The amounts of GRP expression normalized against actin in peach were determined by reverse transcription-quantitative PCR (RT-qPCR). The results were consistent with those determined by enzyme-linked immunosorbent assay (ELISA). The GRP expression was more evident in flesh than peel and increased rapidly in the maturing period. This approach is applicable to estimate the amount of GRP in other plants.
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