by immunofluorescence , the well-developed filamentous cytoskeleton proved to be actin-rich . beta-hcg ( human chorionic gonadotropin ) and sp1 ( beta 1-specific pregnancy glycoprotein ) were detected in only a few tumor cells , whereas most of them stained for hpl ( human placental lactogen ) .
C0010853
cytoskeleton
C0001271
actin