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The present study investigates the susceptibility of individual myofibrillar proteins from mackerel ( Scomber scombrus ) mince to undergo carbonylation reactions during chilled storage , and the antioxidant capacity of ( + ) - catechin to prevent oxidative processes of proteins .
 ( + ) - catechin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( + ) - catechin