You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when are amino acids used instead of glucose?" whose answer is Gluconeogenesis (GNG).
Each document should contain about 30 words, and these documents should contain useful information.

Query: when are amino acids used instead of glucose
Useful Output:

Doc 1:  Instead of being an extended chain of amino-acids, a  used for energy, or converted into glucose or fatty acids. Use of amino-acids
Doc 2: Most of the time, amino acids are recycled into new proteins and not used as a source of energy. This is because it is more energy efficient
Doc 3: The study was designed to examine the contribution of direct (substrate-mediated) and indirect (hormone-mediated) effects of amino acids on hepatic glucose
Doc 4: In order to enter cellular respiration, most amino acids must first have their amino group removed in a process called deamination. A toxic by-
Doc 5: Theoretically, yes. Any excess food energy is available to be stored as fat. The body doesn't prefer to break down protein into sugars, but it can and will.