Evolution of the major histocompatibility complex: molecular cloning of major histocompatibility complex class I from the amphibian Xenopus.
Proc Natl Acad Sci U S A. 1991 Jan 15;88(2):537-41. doi: 10.1073/pnas.88.2.537.
Proc Natl Acad Sci U S A. 1991.
PMID: 1703301
Free PMC article.