A subset of HLA-B27 molecules contains peptides much longer than nonamers.
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Proc Natl Acad Sci U S A. 1994 Feb 15;91(4):1534-8. doi: 10.1073/pnas.91.4.1534.
Proc Natl Acad Sci U S A. 1994.
PMID: 8108441
Free PMC article.