On some properties of the exopeptidase of Gammarus (Rivulogammarus) roeseli Gervais (Amphipoda) and Asellus aquations (L.) (Isopoda)

Ponyi, Jenő and Biró, Kálmán and P.-Zánkai, Nóra (1969) On some properties of the exopeptidase of Gammarus (Rivulogammarus) roeseli Gervais (Amphipoda) and Asellus aquations (L.) (Isopoda). A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 36. pp. 223-228. ISSN 0365-3005

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Abstract

1. The specific activity (Vs) of the hepatopancreas of Gammarus (Rivulogammarus) roeseli Gervais and Asellus aquaticus (L.) on carbobenzoxyglycyl- L-phenylalanine (CGP) and carbobenzoxy-L-glutamyl-L-tyrosine (CGT) is more than tenfold as that known for the other Decapod species. 2. The activity quotient of CGP/CGT (1.23 and 1.28, respectively) of the two investigated species refers, similarly to the case of Astacus and Cambarus (1.01 and 1.42, respectively), to a slight substrate specificity. 3. Of the 3 albumen fractions (peak) received during the sephadex gel filtration of the enzyme preparation of Gammarus only one was active with respect to CGP and CGT, respectively.

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