title: Enzymes as markers in virus preparations.
mesh_terms: D000135:Acid Phosphatase / Q000302:isolation & purification*; D000251:Adenosine Triphosphatases / Q000302:isolation & purification*; D000255:Adenosine Triphosphate; D002499:Centrifugation, Density Gradient; D009980:Influenza A virus / Q000201:enzymology* / Q000302:isolation & purification; D009439:Neuraminidase / Q000302:isolation & purification; D009708:Nucleotidases / Q000302:isolation & purification*; D010088:Oxidoreductases / Q000302:isolation & purification; D010710:Phosphates; D013395:Sucrose
chemical_list: D010710:Phosphates; D013395:Sucrose; D000255:Adenosine Triphosphate; D010088:Oxidoreductases; D009708:Nucleotidases; D000135:Acid Phosphatase; D009439:Neuraminidase; D000251:Adenosine Triphosphatases