Fig. 8.
Digest of the synthetic peptides in 10 % human serum. Data were presented as percentages of peptide remained which was calculated from the area of the corresponding peak obtained by RP-HPLC. *P < 0.05, **P < 0.01, and ***P < 0.001 represented the significances versus P281 group. Data were represented as mean ± SD (n = 5)