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Science 10 January 1969:
Vol. 163. no. 3863, pp. 183 - 184
DOI: 10.1126/science.163.3863.183
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Articles

Lysozyme Retention by Cockroach Periplaneta americana L

Denis R. A. Wharton 1

1 Pioneering Research Laboratory, U.S. Army Natick Laboratories, Natick, Massachusetts 01760

Blood from the cockroach Periplaneta americana usually does not react with a suspension of Micrococcus lysodeikticus. When lysozyme is added to the mixture it causes an immediate reduction in the optical density at 450 nanometers which is soon followed by a strong rise. Blood from roaches injected with lysozyme causes a similar series of changes in the optical density of a suspension of M. lysodeikticus, an indication that lysozyme has been retained in the blood. It may persist for many days or weeks.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)