(n.) A compound of antimonious acid and a base or basic radical.
(n.) Stibnite.
Example Sentences:
(1) Extrapolation of the amount of FSBA required to inactivate the protein indicated that 1 mol of FSBA was sufficient to inhibit the activity of 1 mol of ArsA protein in the absence of substrates, while only 0.5 mol was required in the presence of the anionic substrate antimonite.
(2) The estimated Ki values for FSBA were 0.4 mM in the absence of antimonite and 0.1 mM in the presence of antimonite, suggesting that the binding of antimonite increased the affinity of ArsA protein for FSBA.
(3) ATP was partially protected from trypsin digestion, while the anionic substrate antimonite alone had no effect on proteolysis.
(4) Partial deletion of 56 bp from the 3' end of the arsC gene resulted in loss of resistance to arsenate; the determinant retained arsenite and antimonite resistances.
(5) The plasmid-borne arsenical resistance operon encodes an ATP-driven oxyanion pump for the extrusion of the oxyanions arsenite, antimonite and arsenate from bacterial cells.
(6) In the presence of antimonite the weight average molecular mass increased to a mass in excess of 100 kDa.
(7) The ars operon was induced by arsenate [As(V)], arsenite [As(III)], and antimonite [Sb(III)], to which the strains were resistant, plus Bi(III) in S. aureus.
(8) The arsenate, arsenite, and antimonite resistance was shown to be inducible by all three heavy metal ions.
(9) These results demonstrate that ATP and antimonite together produce a conformational change which is different from that of the ArsA protein in the presence of either substrate alone and suggest interaction between the oxyanion and ATP binding sites.
(10) When expressed in Escherichia coli this ATP-driven oxyanion pump catalyzes extrusion of the oxyanions arsenite, antimonite and arsenate.
(11) The arsenate, arsenite, and antimonite resistance region of the Staphylococcus xylosus plasmid pSX267 was subcloned in Staphylococcus carnosus.
(12) Membranes of uncA mutants containing both the ArsA and ArsB proteins exhibit arsenite(antimonite)-stimulated ATPase activity.
(13) The catalytic component of the pump, the 63 kDa ArsA protein, hydrolyses ATP in the presence of its anionic substrate antimonite (SbO2-).
(14) The cloned staphylococcal ars operon confers resistances to arsenate, arsenite, and antimonite in S. aureus and Bacillus subtilis.
(15) The inactivation of arsR also resulted in reduction of resistance to arsenite and antimonite, while arsenate resistance was unaffected.
(16) Purified ArsA protein is an arsenite(antimonite)-stimulated ATPase.
(17) ATP and antimonite together provided complete protection, indicating interaction of the anion- and nucleotide-binding sites.
(18) The same operon was also expressed in E. coli and conferred resistance to arsenite but less resistance to arsenate and antimonite.
(19) In most cases these provide resistance to both the oxyanions of +III oxidation state, antimonite and arsenite, and the +V oxidation state, arsenate.
(20) The ArsA protein, the catalytic component of the plasmid-encoded resistance system for removal of the toxic oxyanions arsenite, antimonite, and arsenate from bacterial cells, catalyzes oxyanion-stimulated ATP hydrolysis.
Stibnite
Definition:
(n.) A mineral of a lead-gray color and brilliant metallic luster, occurring in prismatic crystals; sulphide of antimony; -- called also antimony glance, and gray antimony.
Example Sentences:
(1) Optimum pH, temperature and pulp density for microbiological leaching of museum-grade stibnite mineral has been investigated using a stibnite-adapted strain of Thiobacillus ferrooxidans.