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. 2022 Mar 31;20:167. doi: 10.1186/s12951-022-01376-y

Scheme 1.

Scheme 1

Graphic abstract of the developed sandwich to detect S. Enteritidis in practical sample. a Nbs were screened by the phage display platform. b SE-Nbs and SE-Nbs-vHRP were produced by E. coli expression system and eukaryotic expression system in HEK293T cell, respectively. c Detection practical sample with the developed sandwich ELISA