This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Which precipitates at 50 oC-60 oC but disappears on heating - \nSelect and explain. \nA. Heavy chain, B. Light chain, C. Both, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Light chain is tested by heating urine to 140degF (60degC). At this temperature, the Bence Jones proteins will clump. The clumping disappears if the urine is fuher heated to boiling and reappears when the urine is cooled. Reff: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:99', 'role': 'assistant'}]