Examlex
What sort of instrument is used to determine the parent-daughter ratio of isotopes, and what does it measure?
Negative Control
A genetic control system in which a regulatory protein binds to DNA, turning off transcription of a gene. Compare with positive control.
Operon
In prokaryotes, a group of structural genes that are coordinately controlled and transcribed as a single message, plus their adjacent regulatory elements.
Protein Binding
The interaction between a protein and another molecule, which could be another protein, a small molecule, or DNA, critical for many biological processes.
cAMP Levels
Concentrations of cyclic adenosine monophosphate, a secondary messenger important in many biological processes including signal transduction and intracellular communication.
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