BETA-GLUCOSIDASE AND A PROCESS FOR EXTRACTION THEREOF
申请人:Sangwan Neelam Singh
公开号:US20070212745A1
公开(公告)日:2007-09-13
The present invention provides a novel beta glucosidase and a process for extraction of a beta-glucosidase from
Rauvolfia serpentine
useful for the cleaving of beta-1,4 linkage of PNPG and to convert other gluco-conjugates such as strictosidine and raucaffricine into their corresponding aglycon such as vomilenine, commercially through immobilizing the enzyme. The β glucosidase enzyme has shown maximum activity in the acid pH range, with high optimum temperature using PNPG as substrate. The crude enzyme, when stored at 4° C., was quite stable for 6 days with 50% loss of activity. The enzyme was activated in presence of FeSO
4
in the assay mixture.
Cell-Mediated Directed Evolution
申请人:Cornish Virginia W.
公开号:US20090209038A1
公开(公告)日:2009-08-20
The present invention relates to systems which harness the molecular biology of a living cell to direct evolution of biological entities of interest. According to the invention, a host cell is engineered to facilitate mutation of a nucleic acid target corresponding to that entity and select for desirable mutants. As applied to populations of host cells, the invention provides a means to generate and contemporaneously select mutants of interest, allowing for the production of extremely diverse libraries enriched in the most ‘fit’ mutants.