The denitrifying bacterium Paracoccus denitrificans can grow aerobically or anaerobically using nitrate or nitrite as the sole nitrogen source. The biochemical pathway responsible is expressed from a gene cluster comprising a nitrate/nitrite transporter (NasA), nitrite transporter (NasH), nitrite reductase (NasB), ferredoxin (NasG) and nitrate reductase (NasC). NasB and NasG are essential for g...

The divergently transcribed nasA gene and nasB operon are required for nitrate and nitrite assimilation in Bacillus subtilis. The beta-galactosidase activity of transcriptional lacZ fusions from the nasA and nasB promoters was high when cells were grown in minimal glucose medium containing poor nitrogen sources such as nitrate, proline, or glutamate. The expression was very low when ammonium or...

Clones that confer the ability to produce N-acyl amino acids onto model cultured bacterial hosts are frequently identified in activity-based screens of soil DNA libraries. The N-acyl amino acids encoded by these clones are synthesized from acyl-(acylcarrier-protein)s (acyl-ACPs) and amino acids by a diverse group of bacterial enzymes referred to as N-acyl amino acid synthases (NASs). 2] The acy...

precise recogni tion of concept of nasb and character istics of that perver ted ideological current as well as pres entation of an exact, fair definition of it is of great import ance, especially when on e considers that shiite jurists have treated that current as infidelity. th e present essay analy zes and juristically criticizes differ ent opinions on the conc ept of nasb ranging from akhbar...

The Arabic language is the of eloquence, and God Almighty has honored it with revelation Qur'an on methods its people in discourse. And when was revealed, witnessed peak maturity that made fit to challenge eloquent Arabs a hadith like Qur'an. were unable come up fluent words similar being challenged extremely graceful, most incapable rhetoric, astonishing listeners, capturing minds hearts as if...

Bacillus subtilis cells cannot sporulate in the presence of catabolites such as glucose. During the analysis of Tn10-generated mutants, we found that deletion of the C-terminal region of the tnrA gene, which encodes a global regulator that positively regulates a number of genes in response to nitrogen limitation, results in a catabolite-resistant sporulation phenotype. Analyses of nrg-lacZ and ...

Pseudomonas putida JLR11 releases nitrogen from the 2,4,6-trinitrotoluene (TNT) ring as nitrite or ammonium. These processes can occur simultaneously, as shown by the observation that a nasB mutant impaired in the reduction of nitrite to ammonium grew at a slower rate than the parental strain. Nitrogen from TNT is assimilated via the glutamine syntethase-glutamate synthase (GS-GOGAT) pathway, a...

Latar Belakang : Vaksin MR merupakan salah satu vaksin yang wajib diberikan kepada anak 0 – 9 bulan. Produksi menggunakan Human Diploid Cell berasal dari janin sengaja di abortus menimbulkan kontroversi mengenai halal dan haram MR. Penggawa kesehatan masyarakat musti memahami memiliki dasar keilmuan untuk dapat menjawab kerisauan kehalalan sehingga menerima penggunaan sebagai bentuk preventif p...

In order to identify the biogeochemical parameters controlling pCO2, total chlorophyll a, and dimethyl sulfide (DMS) concentrations during the North East Atlantic Spring Bloom (NASB), we used previously unpublished particulate and dissolved elemental concentrations to construct several linear regression models; first by hypothesis-testing, and then with exhaustive stepwise linear regression fol...