Kai-Yu Wang, Hai Lian, De-Fang Chen, Jun Wang, Ling-Yuan Huang, Cheng-Wei Li, Prokaryotic Expression of p1 Gene of Yersinia ruckeri Isolated from Channel Catfish (Ictalunes punctatus) and Optimization of Expression Conditions, Journal of Animal and Veterinary Advances, Volume 11,Issue 20, 2012, Pages 3800-3805, ISSN 1680-5593, javaa.2012.3800.3805, (https://makhillpublications.co/view-article.php?doi=javaa.2012.3800.3805) Abstract: The p1 gene of Yersinia ruckeri (yrp1) which was isolated from channel catfish was amplified by PCR with specific primers and inserted into pMD19-T vector. The positive recombinant plasmid was selected and sequenced. Then, the yrp1 gene was subcloned into pET-32a (+) vector and transformed into BL21 (DE3) followed by induction with IPTG and detection with SDS-PAGE. Optimization of the induction conditions were conducted. The results showed that the recombinant protein with a molecular mass of about 72 kDa was mostly packaged into inclusion bodies. The optimization of induction process conditions led us to perform the fusion protein induction at 37°C for 4 h with 0.8 mM IPTG. Keywords: Yersinia ruckeri;p1 gene;prokaryotic expression;optimization;China