חיפוש מתקדם
Phytochemistry
Kahn, V., Division of Food Technology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Avocado polyphenol oxidase (PPO) was precipitated mainly in the 30-90% saturated ammonium sulfate fraction. The 40-75% saturated ammonium sulfate fraction (the partially purified enzyme) had the highest specific activity in the cultivars Lerman, Horeshim and Fuerte. The PPO was active towards o-dihydroxyphenols. Six active enzymes (a-f) were detected with D,L-DOPA, 4-methylcatechol, catechol, caffeic acid or chlorogenic acid. Band e was the most active in all cases. More isoenzyme bands (fast-moving) were observed with caffeic acid than with 4-methylcatechol. Furthermore, the isoenzyme patterns of the partially purified extracts of the cultivars could be distinguished with respect to caffeic acid. © 1976.
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הספר "אוצר וולקני"
אודות
תנאי שימוש
Polyphenol oxidase isoenzymes in avocado
15
Kahn, V., Division of Food Technology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Polyphenol oxidase isoenzymes in avocado
Avocado polyphenol oxidase (PPO) was precipitated mainly in the 30-90% saturated ammonium sulfate fraction. The 40-75% saturated ammonium sulfate fraction (the partially purified enzyme) had the highest specific activity in the cultivars Lerman, Horeshim and Fuerte. The PPO was active towards o-dihydroxyphenols. Six active enzymes (a-f) were detected with D,L-DOPA, 4-methylcatechol, catechol, caffeic acid or chlorogenic acid. Band e was the most active in all cases. More isoenzyme bands (fast-moving) were observed with caffeic acid than with 4-methylcatechol. Furthermore, the isoenzyme patterns of the partially purified extracts of the cultivars could be distinguished with respect to caffeic acid. © 1976.
Scientific Publication
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