beta-galactosidase

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β-ga·lac·to·sid·ase

(gă-lak'tō-sīd'ās),
An enzyme that hydrolyzes the β-galactoside linkage in lactose-producing glucose and galactose; also hydrolyzes the chromogenic substrate IPTG (isopropylthiogalactoside) and thus is used as an indicator of fused genes and gene expression.

beta-galactosidase

See lactase.

GLB1

A gene on chromosome 3p21.33 that encodes beta-galactosidase-1, a lysosomal enzyme that hydrolyses the terminal beta-galactose from gangliosides and other glycoconjugates.

Molecular biology
GLB1 mutations cause GM1-gangliosidosis and mucopolysaccharidosis IV (Morquio B syndrome).

β-galactosidase


β-galactosidase

a lysosome hydrolase.
References in periodicals archive ?
A atividade da b-galactosidase foi determinada incubando 1,5 mL de 50 mM de tampao acetato de sodio pH 4,5, contendo 3 mM de p-nitrofenil b-D-galactopiranosideo com 0,5 mL do extrato enzimatico, a 55[degrees]C, durante 20 minutos.
Amylolytic activity was found in 66% of the isolates, 74% of the isolates were b-galactosidase producers, 51% of the isolates were found to possess cellulase activity while 38% were protease producers.
Softening of dragon fruit is paralleled with a gradual increase in activities of the major cell wall degrading enzymes such as PG, PME, b-galactosidase and cellulase and modification of the various pectic and hemicellulosic components of the cell wall.
Figure 3 indicates that background B-galactosidase activity for the negative controls is significantly lower (p [is less than or equal to] 0.
Structure, function and applications of microbial b-galactosidase (lactase)