Lactate Dehydrogenase of Lobster (Homarus americanus) Tail Muscle
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چکیده
منابع مشابه
Lactate dehydrogenase of lobster (Homarus americanus) tail muscle. II. Kinetics and regulatory properties.
Kinetic studies on the purified lobster muscle lactate dehydrogenase indicate that the reaction catalyzing the oxidation of lactate by DPN+ is modulated by the product DPNH. At low concentrations DPNH activates the reaction and at higher concentrations inhibits it. The combined effects of positive and negative modulations in activity result in sigmoidal rate patterns and rate plotted against DP...
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The stomach of the American lobster (Homarus americanus) is located in the cephalothorax, between the rostrum and the cervical groove. The anterior end of the stomach is defined by the mouth opening and the posterior end by the bottom of the pylorus. Along the dorsal side of the stomach lies the stomatogastric nervous system (STNS). This nervous system, which contains rhythmic networks that und...
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INTRODUCTION The heart-ganglion preparation of the lobster is an independent nerve-effector system. It can be isolated from the rest of the animal and maintained for many hours, actively contracting, in a cooled saline bath. It is therefore an ideal system for studying the functional organization of a relatively simple organ a pump that is governed by a part of the nervous system composed of on...
متن کاملTemperature dependence of cardiac performance in the lobster Homarus americanus.
The lobster Homarus americanus inhabits ocean waters that vary in temperature over a 25 degrees C range, depending on the season and water depth. To investigate whether the lobster heart functions effectively over a wide range of temperatures we examine the temperature dependence of cardiac performance of isolated lobster hearts in vitro. In addition, we examined whether modulation of the heart...
متن کاملCadmium and copper metallothioneins in the American lobster, Homarus americanus.
Lobsters were fed cadmium-rich oysters for 28 days, and the induction of cadmium metallothionein and its relation to concentrations of cadmium, copper, and zinc in the digestive gland and gills was determined. A portion of the tissues also was retained for determining the cytosolic distribution of these metals by gel filtration and ion-exchange chromatography. The digestive gland contained a ma...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1969
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)91709-6