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. 2019 Sep 16;81(10):1475–1484. doi: 10.1292/jvms.19-0057

Fig. 1.

Fig. 1.

Expression, purification, and characterization of the recombinant B subunit of the Escherichia coli heat-labile enterotoxin (rLTB). (A) Sodium dodecyl sulfate-Polyacrylamide gel electrophoresis (SDS-PAGE) analyses for rLTB expression at indicated time points, post initial methanol addition to culture supernatants. (B) Western blot analyses for rLTB determination. Lanes 1 and 2: purified rLTB obtained from 2 independent experiments cultured in anti-cholera toxin (CT) antibody; Lane 3: purified rLTB cultured in CT-negative serum. (C) Ganglioside M1 (GM1)-ganglioside binding assay using enzyme-linked immunosorbent assay (ELISA). GM1 ganglioside coated or non-coated plates were incubated with purified rLTB, diluted as indicated. Results are from 2 independent experiments.