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ACE inhibitory activity of hydrolysates from Cyclina sinensis. The Cyclina sinensis hydrolysates were divided into four parts by ultrafiltration: The MW of fraction CSH-I is less than 3 kDa; The MW of the fraction CSH-II is between 3 and 5 kDa; The MW of the fraction CSH-III is between 5 and 8 kDa; The MW of the fraction CSH-IV is above 8 kDa.
