1.
China Biotechnology
;
(12)2006.
Article
in Chinese
| WPRIM
| ID: wpr-685195
ABSTRACT
CTB protein possessed mucosal adjuvant immunoactivity. The CTB gene was amplified by PCR method from a strain V. cholerae. The nucleotide sequence of CTB gene was 375 bp and shared 96.0%~99.2% homology with other 6 CTB genes. The recombinant plasmid pTWIN1-CTB transformed E. coli strain BL21(DE3) expressed with 0.8 mmol/L IPTG. The molecular weight of expression products was identical with expectative weight by SDS-PAGE electrophoresis. The CTB fusion proteins mainly assembled inclusion bodies and the outputs of proteins were approximately 20% of the total bacterial proteins. The CTB proteins possessed mucosal immunoactivity by GM1-ELISA assay.