Table 1

NAT2 allele identification according to restriction pattern and corresponding enzyme phenotype. + or − signs refer to the presence of restriction sites within the NAT2 gene

Allelotype		Predicted NAT2 phenotype		Restriction site
Allelotype		Predicted NAT2 phenotype		Kpn I	Dde I	Taq I	BamHI
NAT2^*4	Fast	+	−	+	+
NAT2^*5B	Slow	−	+	+	+
NAT2^*5A	Slow	−	−	+	+
NAT2^*5C	Slow	+	+	+	+
NAT2^*6B	Slow	+	−	−	+
NAT2^*7A	Slow	+	−	+	−