title: The collagenolytic activity of avian medullary bone: effect of laying status and parathyroid extract.
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000201:enzymology*; D002118:Calcium / Q000378:metabolism; D002645:Chickens / Q000378:metabolism*; D003094:Collagen / Q000378:metabolism*; D004531:Eggs; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D005269:Femur / Q000201:enzymology; D010060:Ovulation; D010281:Parathyroid Hormone / Q000494:pharmacology*; D013739:Testosterone / Q000494:pharmacology; D013977:Tibia / Q000201:enzymology
chemical_list: D010281:Parathyroid Hormone; D013739:Testosterone; D004958:Estradiol; D003094:Collagen; D002118:Calcium