Bioinformatic characteristics, excision/cyclization activities and prevalence of an ICE element, ICESag1535, in Streptococcus agalactiae isolated from fish

• CHE Hang, 
• LU Yanbo, 
• WANG Chengde, 
• LUO Minyi, 
• LI Guo, 
• ZHANG Defeng, 
• LIN Li, 
• ZHAO Lijuan