Identification of the major pregnancy-specific antigens of cattle and sheep as inactive members of the aspartic proteinase family.
Proc Natl Acad Sci U S A. 1991 Nov 15;88(22):10247-51. doi: 10.1073/pnas.88.22.10247.
Proc Natl Acad Sci U S A. 1991.
PMID: 1946444
Free PMC article.