Chen, G.G.ChenGuan, Z.Z.GuanCHAO-TSEN CHENFu, L.L.FuSundaresan, V.V.SundaresanArnold, F.H.F.H.Arnold2018-09-102018-09-101997http://www.scopus.com/inward/record.url?eid=2-s2.0-0030897176&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/330007journal article10.1038/nbt0497-3542-s2.0-0030897176