Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
The generation of transgenic non-human primates provides a potential means to understand the genetic differences that distinguish humans from our nearest evolutionary relatives. However, the same features that make non-human primates good models for such research also raise serious ethical concerns.
