id author title date pages extension mime words sentences flesch summary cache txt cord-262268-gm99cadh Wang, Jingqiang Assessment of Immunoreactive Synthetic Peptides from the Structural Proteins of Severe Acute Respiratory Syndrome Coronavirus 2003-12-01 .txt text/plain 4027 189 49 Consequently, we thoroughly investigated the immunoreactivities with patient sera of a series of synthesized peptides from SARS-coronavirus structural proteins. Results: Four epitopic sites, S599, M137, N66, and N371-404, located in the SARS-coronavirus S, M, and N proteins, respectively, were detected by screening synthesized peptides. The peptides representing the COOH terminus of the N protein, in particular N371 and N385, had high absorbance/cutoff value ratios with the highest positive detection rate and the lowest hydrophobicity score among all of the synthesized peptides (Fig. 1C, and Fig. 3 in the online Data Supplement). The other 17 peptides reacted only slightly with the sera from SARS patients and gave low detection rates, suggesting that the regions of the S protein covered by these peptides have no epitopic site. The patient sera preincubated with 4 mg/L S599 or N385 gave a 25-30% lower response in the ELISA (data not shown), suggesting that the two peptides could compete with SARS coronavirus for binding to the antibodies in SARS serum. ./cache/cord-262268-gm99cadh.txt ./txt/cord-262268-gm99cadh.txt