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Calcium is essential for a variety of functions in animals, including signal transduction, transmission of nerve impulses, and bone and scale growth. In freshwater adapted teleosts, blood calcium levels are maintained constant (2-4 mM) even at low external calcium concentration (< 0.01 mM). Epithelial cells in skin and gill have been implicated in calcium homeostasis. We have cloned a cDNA from...
A cDNA clone (rpS13) encoding the S13 ribosomal protein (rpS13) has been isolated from the catfish Ictalurus punctatus, and is the first example of an rpS13 isolated from a teleost species. The deduced 151-amino-acid (aa) sequence is 96% identical to the rat and human rpS13, extending the evolutionary conservation of this protein.
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