Citation
Tan, C. H. and Choong, K. Y.
(1981)
Effect of hyperosmotic stress on hemolymph protein, muscle ninhydrin-positive substances and free amino acids in Macrobrachium rosenbergii (de man).
Comparative Biochemistry and Physiology Part A: Physiology, 70 (4).
pp. 485-489.
ISSN 1096-4940
Abstract
1. Acclimation of M. rosenberqii by gradual transfer from dilute to more concentrated media caused a significant decrease in the hemolymph protein content.
2. This phenomenon is related with a concomittant increase in muscle ninhydrin-positive substances (NPS) and free amino acids (FAA). The hemolymph NPS is, however, independent of salinity.
3. Glutamic acid, proline, glycine, alanine and arginine constitute 70-80% of the total muscle free amino acids, and their concentrations were elevated by as much as 300% during acclimation to seawater.
4. The results indicate the involvement of FAA in intracellular osmotic adjustments to hyper osmotic stress.
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