Ache, also known as Acetylcholinesterase, is a key enzyme that rapidly hydrolyzes the neurotransmitter acetylcholine, terminating its action in cholinergic synapses. This process is crucial for normal neurotransmission in the nervous system, and it is involved in pathways related to muscle function, memory, and learning. Genetic models, especially gene knockout (KO) and conditional knockout (CKO) mouse models, are valuable tools for studying Ache's functions [1].

However, among the provided references, there is no content directly related to Ache from KO/CKO mouse models or other loss-of-function experiments.

In conclusion, Ache is essential for normal neurotransmission by hydrolyzing acetylcholine. Although the provided references do not offer insights from relevant mouse models, such models are generally important for revealing Ache's role in specific biological processes and disease conditions related to the nervous system and muscle function.