title: S-100-like immunoreactivity in a planarian. An immunochemical and immunocytochemical study.
abstract: The presence of an S-100-like immunoreactivity was investigated in the planarian Dugesia gonocephala. By microcomplement fixation assay, measurable amounts of S-100-like immunoreactive material (0.11 microgram/mg soluble protein) were detected in planarian high-speed supernatants. The index of immunological dissimilarity between ox S-100 and planarian S-100-like immunoreactive material was higher than that previously calculated between ox S-100 and all the vertebrates tested. By the immunohistochemical PAP method, S-100-like immunoreactivity was only detectable in the cilia of the epidermal cells. Although the biological meaning of S-100-like immunoreactivity in planarian remains to be clarified, the present data introduce new perspectives into the investigation of S-100.
mesh_terms: D000818:Animals; D002417:Cattle; D002923:Cilia / Q000032:analysis; D003168:Complement Fixation Tests; D007124:Immunoenzyme Techniques; D008297:Male; D009419:Nerve Tissue Proteins / Q000032:analysis*; D010932:Planarians / Q000032:analysis*; D009418:S100 Proteins / Q000032:analysis*; D014419:Turbellaria / Q000032:analysis*
chemical_list: D009419:Nerve Tissue Proteins; D009418:S100 Proteins