[Lysozyme Reference Standard (Control 031) of National Institute of Health Sciences].

The "Lysozyme Reference Standard (Control 951031)" of the National Institute of Health Sciences was prepared. The lysozyme potency of the standard material was assayed against the Lysozyme Reference Standard (Control 951) by turbidimetric method two turbidimetric methods using the dried y-cells of Micrococcus luteus as a substrate. The potency of the standard material was in satisfactory agreement with that of Lysozyme Reference Standard (Control 951) and was defined as 1 mg [potency] per mg.