It has since been learned that a substance was missing from their blood: an enzyme forbiddingly named hypo-xanthine-guanine phosphoribosyltrans-ferase, or PRT in the trade.
Ball purified xanthine oxidase, an enzyme necessary for oxidation of food in the body; found it consisted of a protein fraction and a non-protein fraction containing phosphorus .
Are we addicted to caffeine? Measuring isn't easy. Generation jitters: are we addicted to caffeine? Propped up on my desk before me, there is a vacuum-sealed bag of white powder. Chemists would recognise this substance as a methylated xanthine, composed of tiny crystalline structures.
March 7, 2014 - Lebanon Daily News