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Open Access item Digestive enzymes in marine species. I. Proteinase activities in gut from redfish (Sebastes mentella), seabream (Sparus aurata) and turbot (Scophthalmus maximus)

Authors:Munilla-Morán, R.
Saborido-Rey, Fran
Keywords:Protein digestion, Proteases, Carnivorous fish, Stomach, Intestine, Sebastes mentella, Scophthalmus maximus, Sparus aurata
Issue Date:1996
Publisher:Elsevier
Citation:Comparative Biochemistry and Physiology - B - Biochemistry and Molecular Biology 113(2): 395-402 (1996)
Abstract:The proteolytic activities of the digestive tract of three carnivorous fish species (Sebastes mentella, Scophthalmus maximus, Sparus aurata) have been studied. The activity found in the stomach showed a pH optimum of 2.0 for all species, whereas this was in the alkaline range (9.5-10.0) in the intestinal extracts. Similar optimal temperature was measured for all species, although higher residual activities were detected at low temperatures in redfish and turbot. Lower E a values were detected in stomach than in intestine. The effect of NaC1 concentration on protein digestion differed between stomach and intestine being inhibitory in the former. The main proteolytic enzyme for the acid activity of the stomach of the three species seemed to be a pepsin. However, the enzymatic composition of the intestine was more species specific
Description:8 páginas, 3 tablas, 5 figuras
Publisher version (URL):http://dx.doi.org/10.1016/0305-0491(95)02057-8
URI:http://hdl.handle.net/10261/59392
ISSN:1096-4959
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Appears in Collections:(IIM) Artículos

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