Three agarase genes(hz1, hz2, hz3)of 2 988 bp, 1 437 bp and 1 362 bp respectively, were cloned from strain Agarivorans sp.HZ105. These three agarase genes(hz1, hz2, hz3)encoded agarase HZ1, HZ3 and HZ4 and belonged to glycoside hydrolase family GH50, GH118 and GH16, respectively. The agarase genes of strain HZ105 were linked with vector p ET-32a(+)and then were transfered to Escherichia coli BL21(DE3). These agarase genes were successfully expressed in E. coli cells and their recombinant agarases were prepa...