11. The normal glands respond by secreting parathyroid hormone at a persistently high rate. 12. Secretion of parathyroid hormone is determined chiefly by IP3 and diacylglycerol ( DAG ). 13. Some of this response is due to augmentation of the action of parathyroid hormone . 14. Parathyroid hormone -related protein has been shown to interact with KPNB1 and Arrestin beta 1.15. Parathyroid hormone ( PTH ) is a polypeptidic hormone primarily involved in calcium metabolism.16. Parathyroid hormone regulates serum calcium through its effects on bone, kidney, and the intestine:17. Robert Neer began researching parathyroid hormone injections as means to prevent osteoperosis after menopause. 18. The N-terminal fragment of parathyroid hormone ( PTH 1-34 ) has full biological activity. 19. The exon that is skipped possesses the initiation start codon to produce parathyroid hormone . 20. The plasmid they used codes cells to produce parathyroid hormone .