Chimeric primates: embryonic stem cells need not apply.

Trounson, Alan; Grieshammer, Uta · Cell · 2012

basic_science · Level V

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Abstract

In this issue, Tachibana et al. report the generation of the first chimeras from a nonhuman primate, the rhesus monkey. Unlike mice, rhesus chimeras fail to form when embryonic stem cells are injected into blastocysts. Instead, chimera formation is achieved by aggregation of several four-cell embryos.