PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1467354-2 1992 During the first 24 hours after injection both carnosine and 4-methyluracil increase the activity of adenosine deaminase and purine nucleoside phosphorylase, the key enzymes of purine catabolism which is the main source of O2-. 6-methyluracil 61-75 adenosine deaminase Mus musculus 101-120