BIOCONVERSION OF D-GALACTOSE INTO D-TAGATOSE

被引：94

作者：

CHEETHAM, PSJ

WOOTTON, AN

机构：

[1] Unilever Research, Colworth Laboratory, Sharnbrook, Bedford

来源：

ENZYME AND MICROBIAL TECHNOLOGY | 1993年 / 15卷 / 02期

关键词：

GALACTOSE; TAGATOSE; GLUCOSE ISOMERASE; L-ARABINOSE-KETOL-ISOMERASE; LACTOBACILLUS-GAYONII;

D O I：

10.1016/0141-0229(93)90032-W

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

D-Tagatose has potential food uses as a humectant and/or non-calorific sweetener. A variety of different microbial strains were tested for ability to produce D-tagatose from D-galactose. As a result, we have found that D-tagatose can be produced from D-galactose by the lactic acid bacterium Lactobacillus gayonii. Surprisingly, this bioconversion of a D-hexose sugar is probably carried out by an L-pentose isomerase (L-arabinose-ketol-isomerase) enzyme activity of the cells. Thus this enzyme reacts with the D-hexose isomer of its normal L-pentose substrate. Commercially available D-glucose (xylose)-ketol-isomerases did not carry out this bioconversion. Options for the optimization of this bioconversion are proposed.

引用

页码：105 / 108

页数：4

共 22 条

[1] FORMATION OF LACTULOSE AND TAGATOSE FROM LACTOSE IN STRONGLY HEATED MILK [J].