Abstract
Addition of Fab fragments from rabbit antiserum to surface antigen F9 to 2-cell stage mouse embryos in culture does not alter cleavage; however, the addition prevents culture does not alter cleavage; however, the addition prevents the formation of compact morulae and blastocysts. A similar effect is observed when Fab fragments are added to already compact 8-cell stage or even older morulae, but disappears at the beginning of blastocoel formation. This effect is reversible: uncompact 30-cell embryos washed free of Fab become compact in a few hours, produce blastocysts, and upon reimplantation into pseudopregnant mothers can produce mice. Development is not altered by divalent anti-F9 antibodies, by Fab fragments from sera directed against other embryo surface antigens, or by succinyl concanavalin A.
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Selected References
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