ChEBI

A molecular entity capable of donating a hydron to an acceptor (Bronsted base).

A molecular entity capable of accepting a hydron from a donor (Bronsted acid).

Any fungal metabolite produced during a metabolic reaction in Baker's yeast (Saccharomyces cerevisiae ).

Any mammalian metabolite produced during a metabolic reaction in humans (Homo sapiens).

A molecular messenger in which the molecule is specifically involved in transmitting information between cells. Such molecules are released from the cell sending the signal, cross over the gap between cells by diffusion, and interact with specific receptors in another cell, triggering a response in that cell by activating a series of enzyme controlled reactions which lead to changes inside the cell.

An endogenous compound that is used to transmit information across the synapse between a neuron and another cell.