The neurotransmitters ............, which is critical to the production and regulation of sleep, is derived from the amino acid ...............

Explanation

**Step-by-Step Solution:**

1. **Identify the neurotransmitter related to sleep regulation.**
- The neurotransmitter that is critical for the production and regulation of sleep is GABA (gamma-aminobutyric acid).

2. **Determine the amino acid from which the neurotransmitter is derived.**
- GABA is derived from the amino acid glutamate.

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