Abstract
Antisera to vertebrate actin and actin-binding proteins were used to characterize the cytoskeleton of adult Schistosoma mansoni. Actin, α-actinin and tropomyosin immunoreactivities were detected in the cytoplasm of the apical tegument. Antiserum to α-actinin bound to the tegumental spines and this protein may be involved in cross-linking of spine actin filaments. Actin, α-actinin and tropomyosin antisera bound to the musculature. Strongest immunoreactivity was seen in the parenchyma. Antisera to actin, α-actinin, tropomyosin and spectrin bound to parenchyma cells including those of the tubercles, suggesting that these proteins are located in muscle cell bodies. The distribution ofcytoskeletal proteins is discussed in relation to tegumental repair processes.
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