Nucleotide direct sequences of MPO cDNA (A) and MPO exon 6 (B) from the MPO deficient subject DP. cDNA direct sequence shows the T929C substitution in DP (A, DP). cDNA direct sequence from a normal subject is also shown (A, C). Direct sequence of MPO exon 6 from DP shows the simultaneous presence of C and T bases in position 929.