## Abstract Free amino acids comprise a significant fraction of the total intracellular osmolality in skate tissues. The high amino acid concentrations are maintained by active, Na^+^‐dependent transport systems in the cell membranes. Following transfer to a hypo‐osmotic environment (dilute seawate
Osmotic and cell volume regulation in atrium and ventricle of the Elasmobranch skate, Raja erinacea
✍ Scribed by Forster, Roy P; Hannafin, Jo Ann
- Book ID
- 122589557
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 710 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0300-9629
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## Abstract The capacity of isolated tissues of the little skate (__Raja erinacea__) to oxidize β‐alanine, sarcosine, and taurine, and the role of amino acid oxidation in the modulation of intracellular free amino acid concentrations was investigated in vitro. Liver was found to be the primary site
## Abstract The capacity for synthesis of β‐alanine, sarcosine, and taurine was investigated in tissue slices from the little skate (__Raja erinacea__). Synthesis of β‐alanine was found to occur predominantly in the liver and at a rate comparable to the β‐alanine oxidation rate previously measured
Elasmobranchs maintain a high concentration of NaCl in their extracellular fluid, which is matched intracellularly by organic solutes such as p-amino acids. Hypo-osmotic stress causes a volume regulatory response involving a n increased efflux of p-amino acids. The mechanism of transmembrane signali
## Abstract An enzyme‐linked immunosorbent assay (ELISA) was developed to detect vitellogenin in skates. The antibody raised against the yolk protein lipovitellin was shown to recognize a sexspecific, estrogen‐inducible 205 kD protein in plasma, previously identified in skate as vitellogenin. The d