Patent · US Expired

Acid stable protease from mutants of genus Rhizopus

US4473644A · kind A · utility

9Cited by

2References

7Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Joachim Schindler
Friedhelm Bartnik · Düsseldorf, DE
Rolf Schmid · Gelterkinden, CH
Albrecht Weiss · Linden, DE

Key dates

Filing date	Aug 18, 1982
Grant date	Sep 25, 1984
Priority date	—
Expiry date	Aug 18, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S435/939
WIPO fieldBiotechnology
WIPO sectorChemistry

Abstract

Process for the preparation of acid stable protease having a broad activity spectrum by culturing selected mutants of Rhizopus rhizopodiformis CBS 227.75 under aerobic conditions in a nutrient medium containing assimilable carbon and nitrogen sources, at a pH between 3 and 7 and at a temperature between 25.degree. C. and 50.degree. C., and separating the resulting protease enzyme; the mutants used in the process together with a process for preparation of the mutants.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.