Now showing items 1-10 of 15
A new proposal for urease mechanism based on the crystal structures of the native and inhibited enzyme from Bacillus pasteurii: Why urea hydrolysis costs two nickels
(Elsevier (Cell Press), 1999)
Background: Urease catalyzes the hydrolysis of urea, the final step of organic nitrogen mineralization, using a bimetallic nickel centre. The role of the active site metal ions and amino acid residues has not been elucidated ...
Multibump solutions to possibly degenerate equilibria of almost periodic Lagrangian systems
(Springer Verlag (Germany), 1999)
We study via variational methods some chaotic features of a class of almost periodic Lagrangian systems on a torus. In particular we show that slowly oscillating perturbations of such systems admit a multibump dynamics ...
Iron reduction in iron-stressed plants of Actinidia deliciosa genotypes: Involvement of PM Fe(III)-chelate reductase and H+-ATPase activity
Micropropagated plantlets of the Actinidia rootstock D1, resistant to lime-induced iron (Fe) deficiency, and the Actinidia deliciosa line 2084 (sel. 2084), moderately sensitive to Fe starvation, were grown in nutrient ...
Water-extractable humic substances enhance iron deficiency responses by Fe-deficient cucumber plants
The ability of Fe-deficient cucumber plants to use iron complexed to a water-extractable humic substances fraction (WEHS), was investigated. Seven-day-old Fe-deficient plants were transferred to a nutrient solution ...
Modulation of NO3- uptake by water-extractable humic substances: involvement of root plasma membrane H(+)ATPase
The effect of a water extractable humic substances fraction (WEHS) on nitrate uptake and plasma membrane (pm) H+-ATPase activity of maize roots was investigated. Four days old maize root seedlings were exposed for 4 to 24 ...
Structural analysis and disulfide-bridge pairing of tow odorant-binding proteins from Bombyx mori
Pheromone-binding protein (PBP) and general odorant-binding proteins (GOBPs) were purified from the antennae of Bombyx mori and structurally characterised. The amino acid sequence of GOBP-2 has been corrected. The disulphide ...