Abstract
The ABO locus on chromosome 9 contains many more alleles than are currently used routinely in forensic science. The use of single-strand conformation polymorphism (SSCP) can separate sequence polymorphisms that differ by only one base. The SSCP process used allows for both single- and double-stranded polymerase chain reaction (PCR) products to be visualized. The six ABO genotypes can be differentiated by the allele-specific B and O SSCP patterns. The double-stranded DNA produced 'hybrid' bands due to heterozygous samples and allowed sequence diversity to be detected between alleles of heterozygotes. These 'hybrid' bands are valid markers to confirm genotypes of specimens.
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