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PubMed1986

Enzymatic determination of veratryl alcohol.

A rapid and sensitive method was developed for the measurement of veratryl alcohol--a secondary metabolite of some lignin degrading fungi. The method is based on the enzymatic oxidation of veratryl alcohol to veratraldehyde by the ligninase of Phanerochaete chrysosporium. The purified enzymes oxidized veratryl alcohol completely to veratraldehyde (75%) and some unidentified products. The enzymatic method was applied to measure veratryl alcohol in the culture filtrates of Chrysosporium pruinosum and it gave the same results as the conventional method involving extraction and separation by high-pressure liquid chromatography. Benefits and limitations of the method are discussed.

Benzyl Alcohols↗
PubMed1989

The synthesis and use of activated N-benzyl derivatives of diethylenetriaminetetraacetic acids: alternative reagents for labeling of antibodies with metal ions.

A series of bifunctional chelating agents--substituted benzyl derivatives of diethylenetriaminetetra acids--was synthesized. These agents were used to label antibodies with a lanthanide, Eu3+. The stabilities of their antibody conjugates were evaluated under different conditions and the dissociation rates of Eu3+ were measured at pH 3.2, which is used for fluorescence enhancement in time-resolved fluoroimmunoassays. The synthesized complexing agents were also compared to other reagents used for metal labelings, to diethylenetriaminepentaacetic acid-dianhydride, and to p-isothiocyanatophenyl-EDTA. The asymmetric p-isothiocyanatobenzyl derivative of diethylenetriaminetetraacetic acid-Eu3+ showed reasonably good stability at neutral pH but released Eu3+ rapidly in the acidic fluorescence enhancement solution. This makes it an optimal choice for chelate labeling in dissociation-based time-resolved fluoroimmunoassays.

Animals↗