1. It is not known to what extent the emptying of intracellular Ca2+ stores participates in the mediation of chemoattractantinduced Ca2+ influx in humawneutrophils. To study this question, we compared the properties of bivalent-cation influx in response to the chemoattractant N-formyl-L-methionyl-L-leucyl-L-phenylalanine (f-MLP) and to the microsomal Ca2+-ATPase inhibitor thapsigargin. 2. The i...

Studies of Escherichia coli membranes that were highly enriched in the Salmonella enterica serovar Typhimurium PhoQ protein showed that the presence of ATP and divalent cations such as Mg2+, Mn2+, Ca2+, or Ba2+ resulted in PhoQ autophosphorylation. However, when Mg2) or Mn2+ was present at concentrations higher than 0.1 mM, the kinetics of PhoQ autophosphorylation were strongly biphasic, with a...

We investigate the two-median problem on a mesh with M columns and N rows (M ≥ N ), under the Manhattan (L1) metric. We derive exact algorithms with respect to m, n, and r , the number of columns, rows, and vertices, respectively, that contain requests. Specifically, we give an O(mn2 logm) time, O(r ) space algorithm for general (nonuniform) meshes (assuming m≥n). For uniform meshes, we give tw...

The effectiveness of measuring distances between monovalent and divalent cation sites on enzymes has been examined by 6Li, 7Li, I4N, 15N, 23Na, 39K, 85Rb, 87Rb, and 133Cs nuclear magnetic resonance (NMR). Measurements were made of the paramagnetic effect of enzyme-bound Mn2+ on the longitudinal spin-lattice relaxation rate ( l /T l ) of the monovalent cations by using MnZ+ at the divalent catio...

and Mn2+ oxidation.

A gene coding for GH5 endoglucanase exploited from metagnomic DNA data of bacteria in Vietnamese goats’ rumen was modularity structure including a catalytic module, fibronectin-3 like module and an X module. The recombinant enzyme sucessfully expressed E. coli purified. To study the effect some metal ions chemicals on activity, this study, we used tools Swiss-Prot, ProFunc, COFACTOR prediction ...

An oxide semiconductor (perovskite-type Mn2 O3 ) is reported which has a narrow and direct bandgap of 0.45 eV and a high Vickers hardness of 15 GPa. All the known materials with similar electronic band structures (e.g., InSb, PbTe, PbSe, PbS, and InAs) play crucial roles in the semiconductor industry. The perovskite-type Mn2 O3 described is much stronger than the above semiconductors and may fi...

The potential energy curve of the ground state of Mn2 has been studied using a systematic sequence of complete active spaces. Deficiencies of the routinely used active space, built from atomic 4s and 3d orbitals, has been identified and discussed. It is shown that an additional sg orbital, originating from the atomic virtual 4pz orbitals, is essential for a proper description of static correlat...