The peptide sequence RVPSL, derived from ovotransferrin in
egg white, was also synthesized by the solid phase procedure using
the Fmoc protected amino acid synthesis method (Shanghai
Scientific Peptide Biological Technology Co., Shanghai, China).
The synthesized peptide was purified by HPLC on an octadecyl
silane column (Yu and others 2011). The purity and the molecular
mass of the purified peptide were determined by HPLC and mass
spectrometry (Dionex, MSQ, U.S.A.).