Scientists at Israel’s Weizmann Institute have engineered new proteins, e.g. antibodies or enzymes, that do not exist in nature.  They are designed to have specific properties and can usher in a new age of custom-designed medical treatments.

http://www.pnas.org/content/114/41/10900.abstract

https://wis-wander.weizmann.ac.il/life-sciences/spare-parts-might-%E2%80%9Cjump-start%E2%80%9D-protein-design

https://www.youtube.com/embed/NNYIb5DKISU?rel=0