Abstract
The results of a study of isoenzymes of alkaline phosphatase, isocitric dehydrogenase, glutamic oxalacetic transaminase, and glucose 6-phosphate dehydrogenase in Schistosoma mansoni adults and cercariae have been presented. Two bands of alkaline phosphatase activity were found in adults and cercariae. No activity could be elicited from snail tissue extracts. Mouse liver showed two closely migrating bands. Isocitric dehydrogenase activity could not be demonstrated in adult S. mansoni. Mouse liver showed two bands, and snail and cercariae exhibited only one. Differences in the mobility of the fractions were observed between these extracts. Cercariae and adult extracts yielded three bands of glutamic oxalacetic transaminase activity. Two were anodic and one cathodic. Mouse liver and snail homogenates evidenced two bands of activity, one anodic and one cathodic. Comparison of adult S. mansoni homogenates with mouse liver and snail extracts showed that the cathodic bands had similar mobilities, but none of the anodic bands corresponded to one another in electrophoretic migration. One band of glucose 6-phosphate dehydrogenase activity was obtained from cercariae, adult, and mouse liver extracts. The cercarial band had a shorter migratory path. The band of activity from extracts of adult S. mansoni obtained from the peritoneal cavity of the mouse and by perfusion had the same mobility as the mouse liver band. Snail tissue homogenates showed no activity.
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