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- Title
Pectinesterase and Polygalacturonase Activities and Textural Properties of Rubbery Papaya ( Carica papaya Linn.).
- Authors
Jiang, C.-M.; Wu, M.-C.; Wu, C.-L.; Chang, H.-M.
- Abstract
BSTRACT : Comparisons in color of flesh, pectin composition, pectinesterase (PE), polygalacturonase, cellulase activities, and textural properties of normal green papaya (NGP), rubbery papaya (RP), and normal yellow and ripe papaya (NYRP) were conducted. RP contained about 9.7% pectin with a degree of esterification of 53.1%, while NYRP contained about only 1.2% pectin with a degree of esterification of about 23.4%. PE activity (13.6 unit/g fresh weight) than in RP was significantly lower (18.0 unit/g fresh weight) in NYRP (P < 0.05), whereas polygalacturonase activity (46.9 unit/g fresh weight) in RP was higher (27.0 unit/g FW) than in NYRP. Therefore, in combination with the fact that water extract from RP displayed an inhibitory ratio of 36.0% on papaya PE activity, we suggest the presence of certain substances with strong PE inhibitory activity in RP.
- Subjects
POLYGALACTURONASE; PAPAYA; PECTINS; CELLULASE; ESTERIFICATION
- Publication
Journal of Food Science (Wiley-Blackwell), 2003, Vol 68, Issue 5, p1590
- ISSN
0022-1147
- Publication type
Article
- DOI
10.1111/j.1365-2621.2003.tb12296.x