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. 2016 Apr-Jun;8(2):108–115.

Table 2.

Inhibitory effect of 7-methylguanine and related compounds on PARP-1 and PARP-2.

  IC50 (μM)
PARP-1 PARP-2
7-methylguanine 150 50
7-methylxanthine 800 160
7-methylhypoxanthine 780 620
7-ethylguanine 230 90