title: The presence of a factor toxic to pancreatic beta cells in some collagenase preparations.
mesh_terms: D000818:Animals; D003013:Clostridium / Q000201:enzymology; D005347:Fibroblasts / Q000187:drug effects; D006168:Guinea Pigs; D007515:Islets of Langerhans / Q000187:drug effects*; D003012:Microbial Collagenase / Q000633:toxicity*
chemical_list: D003012:Microbial Collagenase