Fig. 2From: Thiopurine S-methyltransferase activity in Nigerians: phenotypes and activity reference valuesA Weibull plot showing the cumulative frequency distribution of log-transformed thiopurine S-methyltransferase activity in 100 healthy Nigerian subjects. Plots of TPMT subgroups’ activity data, and that of the entire population data are shown. TPMT, thiopurine S-methyltransferaseBack to article page