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Hypothetical mechanism of fatty acid cyclooxygenase reactions.

Hypothetical mechanism of formation of hexa-substituted benzenes.

Hypothetical mechanism of induction of secondary sexual characteristics in Xenopus laevis showing possible targets for modulation by xenobiotics . CRH, corticotropin-releasing hormone DHT, dihydrotestosterone E2, estradiol FSH, follicle-stimulating hormone GnRH, gonadotropin-releasing hormone LH, luteinizing hormone T, testosterone T3, triiodothyronine T4, thyroxine TSH, thyroid stimulating hormone.

Hypothetical mechanism of ligninocellulose transformation by enzymes of white-rot fungi. The initial products of partial wood hydrolysis distinctly induce enzymatic systems accelerating the degradation processes. Reprinted from Leonowicz, A., Cho, N.-S., Luterek, I, et al. . Fungal laccase

Hypothetical mechanism of lumazine synthase.

Hypothetical mechanism of phytoplankton repulsion of bacterial attachment by excretion of acidic cell constituents forming an external pH transition zone into the alkaline seawater .

Hypothetical mechanism of polysulfide sulfur reduction at the substrate site of polysulfide reductase. A sulfur atom is cleaved from the end of the polysulfide sulfur chain which is thereby oxidized. After the uptake of a proton and two electrons, HS is released and molybdenum ion is in the reduced state again.

Hypothetical mechanism of polysulfide sulfur respiration with H2 . The reduction of 8-methyl-menaquinone bound to PsrC hy polysulfide is coupled to the release of a proton to the peri-plasmic side. The dotted and the striped areas designate HydC and PsiC, respectively. Reproduced from Ref. with the permission of Eur. J. Biochem.

Hypothetical mechanism of S-allyl-L-cysteine production with addition of L-cysteine.

Hypothetical mechanism of the antihypertensive effect of monoamine inhibitors. This mechanism does not fit the observation of the cheese reaction , in which tyramine contained in fermented food causes hypertensive episodes in patients receiving monoamine oxidase blockers.

Hypothetical mechanism of the IspG reaction

Hypothetical mechanism of the nitrilase-catalyzed transformation of nitriles into carboxylic acids or amides. E-SH

Hypothetical mechanism of the stainless steel ennoblement in natural seawater ,

Hypothetical mechanisms for C and HCOj -enhanced radiolytic killing of a bacterium by extracellular pathways. Cl radical formation is suppressed by OH-reactive compounds in solution, but COj radical formation is not. In this case, protection by free radical scavengers must arise by direct competition for the CO3 radical. The reaction scheme also includes an intracellular pathway, although target sites are not specified.

Hypothetical mechanisms for extracellular feruloylation of matrix polysaccharides.

Hypothetical mechanisms for O2 formation, a pathway

Hypothetical mechanisms for the oxidative chemistry ofl and the reaction of the one-electron oxidation product, l m. Left from l

Hypothetical mechanisms of aggregation of fish actomyosin during frozen storage. . AM, actomyosin M, myosin MD1 and MDt, denatured myosin A, actin.

Hypothetical mechanisms of the IspH reaction, Birch reduction mechanism

Hypothetical mechanisms of transport by MDTs. Three mechanisms have been suggested for the function of MDTs from different families, and

Hypothetical mechanistic pathways by which inhalation of concentrated ambient particles may lead to morbidity and mortality.

Hypothetical membrane-bound multicomponent receptor.

Hypothetical metabolic passway of allyl - rc group containing compounds derived from garlic.

Hypothetical metabolic pathway for the biotransformation of PAP to PAA.

Hypothetical metabolic transformations of 2-hydroxypropylmethyl nitrosamine with the name of the originator of each hypothesis. Nameless hypotheses are by the authors.



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