Or read the open access, no ad, and what appears to be upstream source: https://www.nature.com/articles/d41586-019-01789-0 https://www.nature.com/articles/d4158

Or read the open access, no ad, and what appears to be upstream source: https://www.nature.com/articles/d41586-019-01789-0 https://www.nature.com/articles/d41586-019-01789-0 that covers the Macaque question along with the completely omitted loss of function topic, video, pictures, and other details.