Modifies a noun

• purine: When no exogenous purines is available, the loss has to be replaced all by de novo synthesis.

• activation: Mouse lymphoma assays in the presence of exogenous metabolic activation also gave positive results in the form of small colonies.

• shock: In addition, the exogenous shocks from centrally initiated policies may not be amenable to local control.

• DNA: Our bodies have spent tens of thousands of years learning how to protect themselves from having exogenous DNA get into their genomes.

• hormone: Physiologically, it would seem unwise to override this adaptation with exogenous thyroid hormone.

• variable: Put another way, South African MFI salary levels are an exogenous variable, beyond the control of MFI managers.

Modifying Another Word

• not: The second theme is that money is endogenous and not exogenous.