Echinoderms: An Autoradiographic Study of Assimilation of Dissolved Organic Molecules

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Science  13 Sep 1968:
Vol. 161, Issue 3846, pp. 1153-1155
DOI: 10.1126/science.161.3846.1153


In a holothurian and an ophiuroid, tritiated glucose and glycine in great dilution are removed from seawater by uptake through the skin. Cells differ in their competence to metabolize specific nutrients, an indication that there are specialized cellular responses to exogenous organic molecules. Embryonic ophiuroid tissues have an exceptional capacity for assimilation.

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