Nachweis hoher Aktivitäten von Kreatin-Kinase bei dem ChaetognathenSagitta setosa

Summary Notably high activities of creatine kinase have been shown in tissues of Chaetognaths both by spectrophotometric assays and on agarose-gels, where the enzyme appears as a single band. Arginine kinase activity could not be detected. It is pointed out that these findings might be of significance in elucidating the systematic position of Chaetognaths.