Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: EC:3.2.1.23 (
beta-galactosidase
)
14,648
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
The aim of the present experiment was to determine the influence of either probiotic or antibiotic inclusion in the diets of pigs from birth on the development of enzyme activity in the small intestine. Pigs were fed on creep feed and grower diets containing either a probiotic, an antibiotic or no added growth promoter. At 7, 17, 42 and 80 d of age pigs from each treatment group were sampled to investigate the development of carbohydrase and peptidase activity in the mucosa at five sites along the small intestine. Inclusion of either the probiotic or antibiotic had a significant effect on the development of sucrase (sucrose alpha-D-glucohydrolase; EC 3.2.1.48), lactase (
beta-D-galactoside galactohydrolase
;
EC 3.2.1.23
) and
tripeptidase
(
EC 3.4.11.4
) activities before weaning but had no effect on depeptidase (EC 3.14.13.11) activity. The study of the distribution of enzyme activity along the small intestine showed significant differences between the proximal and distal sections associated with weaning.
...
PMID:The influence of inclusion of either an antibiotic or a probiotic in the diet on the development of digestive enzyme activity in the pig. 211 23
Regulation by oxygen of the
peptidase T
(pepT) locus of Salmonella typhimurium was studied by measuring
beta-galactosidase
levels in strains containing a pepT::Mu d1(Apr lac) operon fusion. beta-Galactosidase was induced in anaerobic cultures and late-exponential and stationary-phase aerated cultures. Peptidase T activity also was induced under these growth conditions. pepT+ but not pepT strains will utilize as amino acid sources the tripeptides Leu-Leu-Leu and Leu-Gly-Gly only when grown anaerobically. Mutations at two loci, oxrA and oxrB (oxygen regulation) prevent induction of the pepT locus. The oxrA locus is homologous to the fnr locus of Escherichia coli. We have isolated 12 independent Mu d1 insertions (oxd::Mu d1, oxygen dependent) that show induction of
beta-galactosidase
in anaerobic cultures and stationary-phase aerated cultures. These insertions fall into nine classes based on map location. All of the oxd::Mu d1 insertions are regulated by oxrA and oxrB and therefore define a global regulon that responds to oxygen limitation.
...
PMID:Oxygen regulation in Salmonella typhimurium. 391 22
Pseudorevertants able to use L-leucyl-L-leucyl-L-leucine as a leucine source have been isolated from a Salmonella typhimurium strain carrying stable (nonreverting) mutations in pepN, pepA, and pepB. These strains carry mutations at a locus pto (
peptidase T
overproducer) tightly linked to pepT that cause an elevated expression of the
tripeptidase
peptidase T
. An F' episome carrying the pto and pepT loci has been constructed and used to show that the pto mutations are cis dominant. Expression of
beta-galactosidase
from a Mu d1(Apr lac) insertion in pepT is increased by pto mutations. The pto mutations, therefore, define a site affecting the transcription of pepT.
...
PMID:Overproduction of Salmonella typhimurium peptidase T. 631 18
Amylase, alpha- and beta-glucosidase, alpha- and
beta-galactosidase
, beta-fructosidase, trypsin,
aminotripeptidase
, leucine-aminopeptidase, prolinase, prolidase glycyl-L-leucine dipeptidase and glygylglycine dipeptidase are present in the 3rd instar larvae of Chilo auricilius.
...
PMID:Digestive enzymes in the gut and salivary gland of the larvae of Chilo auricilius Ddgn. 698 21
