Techniques used to define human MHC antigens: polymerase chain reaction and oligonucleotide probes.
The various HLA class II specificities, identifiable by serological or cellular typing reagents, reflect underlying polymorphisms of the constituent alpha and beta chains, encoded at several loci within the HLA-D region. Variation in these genes is concentrated in allelic hypervariable regions but can also be found elsewhere. Sequence-specific oligonucleotides (SSO) can be used to detect individual alleles with a high degree of accuracy by probing dot-blotted DNA, amplified to high copy numbe...Expand abstract
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