The phosphoric esters of the pancreas: sphingosine choline phosphate

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Abstract
Half of the acid-soluble P of the pancreas is unprecipitated by Ba(OH)2, mercuric acetate and basic Pb acetate. The ester-phosphorus of this very soluble fraction is hydrolysed with difficulty by acids and by bone phosphatase, but is hydrolyzed by the combined action of phosphomonoesterase and phospho-diesterase. A substance, thought to be sphingosine choline phosphoric ester, was isolated from this fraction.