It said it would acquire Guangzhou Bioseal Biotechnology Co Ltd, a bio-pharmaceutical company developing a biologic product for controlling bleeding during surgery.
Frogs, which breathe and process toxins through their skin, are considered a promising area for pharmaceutical research and a bio-indicator that can tell scientists about what's going on in the environment.
Angel, which is based in Penicuik but also runs facilities in Glasgow and Northumberland, manufactures and supplies clinically-based bio-materials for global biotechnology and pharmaceutical companies.