Directed evolution and immobilization of new lipase Lip 906 Shuang Dai, Shan Liu, Yun Jeonyun, Xiong Xiao, Zujun Deng and He Li E3S Web Conf., 233 (2021) 02030 Published online: 27 January 2021 DOI: 10.1051/e3sconf/202123302030