THE LOCATION OF ONUPHIC ACID IN HYALINOECIA TUBICOLA

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Abstract
Onuphic acid, a sugar phosphate polymer extracted from the tube of Hyalinoecia tubicola, has been identified in the tube and in the body of the polychaete by histochemical methods based on the chemical properties of the macromolecule. Comparison of the results with probe microanalysis for selected elements suggests that onuphic acid is located in regions of high phosphorus density in the lateral-ventral glands, in proximity to sulfur but in the absence of calcium and any large local amounts of magnesium.