Our life processes are regulated by relatively small-molecular-weight
compounds in many situations. The "small molecules" like drugs and
poisons act by modulating the functions of "big molecules" such as
proteins and nucleic acids. In living organisms, there are many native
"small molecules" playing an important role as signal mediators and
growth regulators to maintain the normal and sound conditions. We always
ask ourselves: what kinds of compounds act as regulators of life; what
are the mechanisms of regulation by the chemical compounds; and what are
the structures of the chemical compounds that are responsible for their
regulatory activity? The answers will promote the discoveries of better
chemical tools for future crop protection.
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