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protopectin

[proh-tuh-pek-tin]
noun Biochemistry.
  1. any of the class of water-insoluble pectic substances that are found in the rind of citrus fruits or in apple peels and that are hydrolyzed to pectin or pectic acid.
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Origin of protopectin

First recorded in 1905–10; proto- + pectin
Also called pectinogen, pectose.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018