from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry Any
enzymefound outside of (or on the outer surface of) a cell
from Wiktionary, Creative Commons Attribution/Share-Alike License
Dale and University of Warwick developmental biologist Elizabeth Jones, along with colleagues, discovered the eye-switch while investigating how "ectoenzyme" molecules located on the external surface of cells contributed to the development of locomotion in the African clawed frog (Xenopus laevis).
An even stranger sight resulted when they injected the ectoenzyme into other developing body cells.