ABC transporters are thought to participate in the absorption and secretion of endogenous and exogenous substances.

As a membrane surface receptor, TLR-2 recognizes many bacterial, fungal, viral, and certain endogenous substances.

Implausible as it might seem at first, there is now good evidence that nitric oxide (NO) is an important endogenous dioactive substance.

It is used more broadly than the term drug because it includes endogenous substances, and biologically active substances which are not used as drugs.

In phase 2 of the biotransformation the compound is conjugated with several different endogenous substances.

One of the goals was to find an endogenous anorexigenic substance.

Since then a large number of receptor types have been discovered and in many cases the endogenous substance that acts at these sites has also been found.

Specifically, endogenous benzodiazepine-like substances may play a role in delirium associated with hepatic failure [ 1].

Many endogenous substances are non-specific immunostimulators.

It is an endogenous substance: it occurs naturally in the body of animals.