Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Apr 27;224(2):218–228. doi: 10.1093/infdis/jiab222

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Figure 1. — Validation of SARS-CoV-2 N, S1, and RBD-based enzyme immunoassay. IgG antibody responses against recombinant SARS-CoV-2 GST-N, S1-mFc-6×His, and RBD-mFc-8×His in different serum dilutions of acute and convalescent serum specimens of PCR-positive COVID-19 patients (n = 3) and control individuals (n = 4). GST and proMstn-mFc-6×His were negative control antigens; (A) first sample; (B) second sample. Abbreviations: COVID-19, coronavirus disease 2019; GST, glutathione S-transferase; Ig, immunoglobulin; N, nucleoprotein; OD, optical density; RBD, receptor binding domain; S1, spike protein; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.