activities of adenosine deaminase ( ada ) , adenosine kinase ( ak ) , adenine phosphoribosyltransferase ( aprt ) , hypoxanthine guanine phosphoribosyltransferase ( hgprt ) , and purine nucleoside phosphorylase ( pnp ) , all enzymes of the purine interconversion system , were determined in lymphocytes of 25 patients with chronic lymphatic leukemia ( cll ) and in 23 controls .
C0024264
lymphocytes
C0023434
chronic lymphatic leukemia