| 摘要 |
PCT No. PCT/EP96/02434 Sec. 371 Date Feb. 18, 1998 Sec. 102(e) Date Feb. 18, 1998 PCT Filed Jun. 3, 1996 PCT Pub. No. WO96/38580 PCT Pub. Date Dec. 5, 1996A process is taught for the preparation and recovery of 7-aminodesacetoxycephalosporanic acid (7-ADCA) via enzymatic ring expansion activity on penicillin G, using a Penicillium chrysogenum transformant strain expressing expandase. |
