There he discovered that acetylcholinesterase is present at high concentrations in many different types of excitable nerve and muscle fibres and in brain tissue - lending support for Otto Loewi and Henry Dale's then novel proposal that acetylcholine functions in the transmission of impulses from nerves across junctions to other nerves or to muscles.
There, he observed high levels of acetylcholinesterase in various excitable nerve and muscle fibers, along with brain tissue. This finding aligns with Otto Loewi and Henry Dale's then novel proposal that acetylcholine is crucial for impulse transmission between nerves or to muscles.