The effect water shortage on the nitrogen metabolism of xenopus laevis

1. 1. Xenopus laevis maintains a high concentration of plasma and liver ammonia, which increases after feeding and after desiccation. 2. 2. Desiccation on moist peat, for a period of 2 weeks, causes an increase in the concentration of amino acids, ammonia and urea in the plasma. 3. 3. It is postulat...

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Bibliographic Details
Published inComparative biochemistry and physiology Vol. 23; no. 3; pp. 831 - 845
Main Authors Unsworth, B.R., Crook, E.M.
Format Journal Article
LanguageEnglish
Published England Elsevier B.V 01.01.1967
Subjects
Adaptation, Physiological
Amino Acids - blood
Amino Acids - metabolism
Ammonia - blood
Ammonia - metabolism
Animals
Anura - metabolism
Autoanalysis
Female
Kidney - metabolism
Liver - metabolism
Nitrogen - metabolism
Radioisotopes
Water-Electrolyte Balance
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Summary:1. 1. Xenopus laevis maintains a high concentration of plasma and liver ammonia, which increases after feeding and after desiccation. 2. 2. Desiccation on moist peat, for a period of 2 weeks, causes an increase in the concentration of amino acids, ammonia and urea in the plasma. 3. 3. It is postulated that the general degradation of plasma amino acids, observed after feeding, is under some form of control. 4. 4. Desiccated X. laevis rapidly incorporates ammonia into liver aspartic acid. 5. 5. 15N-alanine is deaminated to give labelled ammonia in the liver and kidney, while 15N-glycine is deaminated to give labelled ammonia in the blood, liver and kidney.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0010-406X
DOI:10.1016/0010-406X(67)90345-3