UREASE ACTIVITY IN TRYPANORHYNCH CESTODES

Autor:	John E. Simmons
Rok vydání:	1961
Předmět:	Urease biology Pterobothrium lintoni Lacistorhynchus tenuis Microbiology Lacistorhynchus chemistry.chemical_compound Biochemistry chemistry biology.protein Urea Helminths Cestode infections General Agricultural and Biological Sciences
Zdroj:	The Biological Bulletin. 121:535-546
ISSN:	1939-8697 0006-3185
DOI:	10.2307/1539452
Popis:	1. Strong urease activity was measured in tissue preparations of two species of trypanorhynch cestodes; activity was not detected in seven species of tetraphyllids, nor in a third trypanorhynch.2. Tissue activity of Lacistorhynchus tenuis homogenates was in excess of 3000 micromoles urea hydrolyzed per gram wet tissue per hour; that of Pterobothrium lintoni was about ten times greater. Tissue activity of intact Lacistorhynchus was about one-tenth that of homogenate preparations.3. The worm activity was partially characterized in homogenate preparations.4. Living worms retain full activity for at least 110 hours, but homogenates rapidly decline in activity; less than 10% of the original activity is measured after 24 hours.5. Production of ammonia and of 14CO2 from [14C] urea was demonstrated using intact Lacistorhynchus.
Databáze:	OpenAIRE
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