Sequence analysis of PCR-amplified exon 9 of the p67-phox gene from genomic DNA from patients SG and CG, their mother, half-sister (maternal), and a normal control. The box in the normal sequence indicates the adenine that is deleted in SG and CG, with only normal sequence seen in the mother and maternal half-sister. The 3′ end of the DNA is at the top of each sequencing panel.