Identification and characterization of a novel fumarase gene by metagenome expression cloning from marine microorganisms oleh Tang Xian-Lai, Bi You-Li, Qin Xing-Mei, Kang Wen-Long, Hu Guo-Qing, Luo Feng-Feng, Ma Ge-Fei, Li Shuang-Xi, Hao Zhen-Yu, Jin Ke, Shen Pei-Hong, Zhao Gao-Chao, Wu Lan-Lan, Jiang Chengjian, Wu Bo