REKOMBINANTE ZELLE, DNA-KONSTRUKTIONEN, VEKTOREN UND METHODEN ZUR EXPRESSION VON PHYTATABBAUENDEN ENZYMEN IN GEWÜNSCHTEN VERHÄLTNISSEN

摘要

PCT No. PCT/US93/07058 Sec. 371 Date May 24, 1995 Sec. 102(e) Date May 24, 1995 PCT Filed Jul. 27, 1993 PCT Pub. No. WO94/03072 PCT Pub. Date Feb. 17, 1994The present invention provides a recombinant combination strain which is capable of over-expressing at least two different genes under two separate promoters in filamentous fungi. The genes encode phytase and pH 2.5 acid phosphatase. Mixtures containing desired ratios of the two enzymes are prepared by recombinant DNA techniques. The enzyme mixtures show a cooperative effect in the degradation of phytic acid and its salts. The preferred ratios of the two enzymes are from about 3:1 to about 16:1.