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US3770589A
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Process for the production of glucose isomerase
Assignee: Genencor International Wisconsin Inc
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Filing: 1971-05-20
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Granted: 1973-11-06
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Expires: 1991-05-20
Abstract
Abstract An improved process for the production of glucose isomerase involves the addition of a specific amount of glycine (aminoacetic acid) to the fermentation medium. This increases the amount of the enzyme, glucose isomerase, that is produced by the microorganism, which preferably is a strain of Streptomyces, most preferably, S. olivochromogenes ATCC 21,114. Even further improvement is obtained by also adding a small amount of ammonium nitrate to the culture medium.
Inventors
- 👤 R Heady
- 👤 W Jacaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:30
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/90; C12N9/92; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/837; Y10S435/84; Y10S435/848; Y10S435/853; Y10S435/863; Y10S435/866; Y10S435/886; Y10S435/906; Y10S435/911; Y10S435/921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
The method of claim 1 wherein the microorganism is a Streptomyces microorganism.
Claim 2
Dependent Claim
13 words
The method of claim 1 wherein the microorganism is Streptomyces olivochromogenes ATCC 21,114.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the microorganism is Streptomyces venezuelae ATCC 21,113.
Claim 4
Dependent Claim
42 words
The method of claim 1 wherein the culture medium contains from 0.2 g. to 10 g./100 ml. of culture medium of a mixture composed of 25 to 75 percent by weight of starch and 75 to 25 percent by weight of xylose.
References Cited (Backward Citations)
US3622463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |