B-galactosidase | definition of B-galactosidase by Medical dictionary
beta-galactosidase (redirected from B-galactosidase)
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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.
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.
GLB1 mutations cause GM1-gangliosidosis and mucopolysaccharidosis IV (Morquio B syndrome).
a lysosome hydrolase.
References in periodicals archive
Synthesis of b- galactooligosaccharides from lactose using microbial b-galactosidases
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.