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Enzyme preparations are products that are used in the histopathology laboratory for the following purposes: (1) To disaggregate tissues and cells already in established cultures for preparation into subsequent cultures (e.g., trypsin); (2) To disaggregate fluid specimens for cytological examination (e.g., papain for gastric lavage or trypsin for sputum liquefaction); (3) To aid in the selective staining of tissue specimens (e.g., diastase for glycogen determination).
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