the incorporation of [ 14c ] thymidine and [ 14c ] uridine into the nucleoprotein , and [ 14c ] phenylalanine into the protein by phytohaemagglutinin ( pha ) stimulated lymphocytes from a patient with the lesch-nyhan syndrome [ hypoxanthine-guanine phosphoribosyl transferase ( ec 2.4.2.8 hgprt ) deficiency ] and controls , was studied over 72 hours of incubation , with and without azaserine to block de novo purine biosynthesis .
C0028612
nucleoprotein
C0033684
protein