- Effects of synthetic analogs and fragments of bovine parathyroid hormone on adenosine 3',5'-monophosphate level, ornithine decarboxylase activity, and glycosaminoglycan synthesis in rabbit costal chondrocytes in culture: structure-activity relations. Takano, T., Takigawa, M., Shirai, E., Suzuki, F., Rosenblatt, M. Endocrinology (1985)