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What is the purpose of NAD+ in the body?
Instrument
An instrument is a formal legal document, such as a contract, will, or security, that gives evidence or details of a transaction or legal act.
Negotiable Instrument
A written document guaranteeing the payment of a specific amount of money to the bearer on demand or at a set time.
Substitute
An alternative option or something that replaces another.
Cash
Physical form of currency, such as coins and banknotes, used to conduct transactions or stored as a financial asset.
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