[Heterogeneity of molecular forms of phenol oxidase from grape leaves].

The substrate specificity and some kinetic properties of the monomeric (Mr = 26 000--35 000) and dimeric (Mr = 55 000--70 000) forms of phenol oxidase from vine leaves were studied. These forms possess different hydroxylating and o-diphenol oxidase activities. A kinetic analysis demonstrated that the monomeric form of the enzyme possesses a higher affinity for monophenols and can more effectively accomplish the hydroxylation reaction as compared to the dimeric one.

[Metabolism of air polluting organic compounds in plants].

The review discusses the date in the plant uptake and conversion of gaseous C1--C5 alkanes, hydroaromatic hydrocarbon--cyclohexane, aromatic mononuclear hadrocarbons--benzene and toluene, polycyclic carcinogenic hydrocarbon -- benzopyrene, monobasic alcohols - isopropyl, isobutyl, amyl, hexyl and octyl alcohols, aldehydes - formaldehyde and acetaldehyde, ketone - acetone, monocarboxylic acids -- formic, acetic, butyric, caproic and acetoacetic acids, phenols - hydroxybenzene and alpha-naphthol. The paper outlines pathways of their detoxication in plants and biochemical foundations of air purification from organic pollutants.