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Effect of treatment with Pyropia yezoensis peptide [PYP1 (1–20)] on epidermal growth factor receptor (EGFR), Shc, growth factor receptor bound protein 2 (Grb2) and son of sevenless (SOS) protein and mRNA expression levels in IEC-6 cells. Proteins were subjected to western blot analysis and cDNA was subjected to RT-PCR. (A) Protein expression levels were increased upon incubation with PYP1 (1–20) for 24 h. (B) mRNA expression levels were also increased, as demonstrated by RT-PCR.
