Abstract
Assays of hydrolase activity toward the following substrates gave specific activities for Achatina fulica digestive juice which were within ± 50% of those for Helix pomatia digestive juice: carboxymethyl cellulose, glycol chitin, laminarin, xylan, glycogen, a glucomannan, gentiobiose, cellobiose, maltose, p-nitrophenol-β-D-glucoside. The specific activities of Achatina digestive juice were substantially higher than those of Helix for hydrolase activity towards lichenin, lactose, trehalose, melibiose, and phenolphthalein-β-D-glucuronide and substantially lower for activity towards sucrose, turanose, and p-nitrophenol sulphate. At the same protein concentration, Achatina digestive juice had greater lytic activity towards Micrococcus lysodeikticus, Bacillus subtilis, Saccharomyces cerevisiae, and Neurospora crassa than Helix digestive juice.
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