Liquefying alkaline .alpha.-amylase, process for producing the same, and detergent composition containing the same
US5635468A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Jan 11, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/386
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The present invention relates to a liquefying alkaline .alpha.-amylase having the enzymatic properties described below, a production process thereof and a detergent composition containing the same. PA0 1) Action: It hydrolyzes .alpha.-1,4-glucosidic linkages in starches, amylose, amylopectin and partial degradation products thereof and from amylose, forms glucose (G1), maltose (G2), maltotriose (G3), maltotetraose (G4), maltopentaose (G5) and maltohexaose (G6). It however does not act on pullulan. PA0 2) Isoelectric point: It has an isoelectric point higher than 8.5 when measured by an isoelectric focusing electrophoresis. The amylase according to the present invention has a liquefying activity capable of permitting degrading starches and starchy polysaccharides at high random, and has an optimum pH on the alkaline side. Owing to the high isoelectric point, it can be purified readily. Detergents with the amylase incorporated therein have excellent detergency especially against the soil of smeared food.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.