{HEAD ~ The present invention} relates to {TAIL ~ an apparatus} for isolating and purifying nucleic acids such as DNA and RNA or proteins such as enzymes and antibodies from biological materials such as microorganisms, e.g., viruses and bacteria, animal and plant tissues 
relates to
{ HEAD ~ The present invention } relates to { TAIL ~ an apparatus } for isolating and purifying nucleic acids such as DNA and RNA or proteins such as enzymes and antibodies from biological materials such as microorganisms , e.g. , viruses and bacteria , animal and plant tissues
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