Abstract
Simple methods for the detection of hypoxanthine-guanine phosphoribosyltransferase and/or adenine phosphoribosyltransferase deficiencies using dried filter paper blood spots were studied. Enzyme activities in the eluate from dried filter paper blood spots stored for 4 weeks at room conditions were shown to be quite stable. Autoradiographs prepared from dried filter paper blood spots and DE-81 papers soaked with enzyme reaction mixtures containing 14C-hypoxanthine and/or 14C-adenine showed sharp radioactive spots in normal subjects. No activity was evident in the cases of the Lesch-Nyhan syndrome and/or adenine phosphoribosyltransferase deficiency. The methods seem to be suitable for screening.
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