[Studies on the semi-biosynthesis of L-ephedrine (I). Studies on the biosynthesis of L-phenyl acetyl carbinol].

OBJECTIVE: The optimal biosynthesis of L-PAC by immobilized Sc-5 yeast cell was systematically studied in this paper. METHOD: Biosynthesis. RESULT AND CONCLUSION: The average of L-PAC yield produced by the immobilized Sc-5 yeast cell is > or = 2 g.L-1 and half life > or = 240 h.