Due to the rapid mutation rate of the missing-link signal molecule, preventing the activation of the gene was infeasible.

The nitrate compounds may generate nitric oxide, an important signal molecule that can give a false positive.

Potential signal molecules have been noted in certain nerve net anatomy.

The autophosphorylation of these amino acids allows for signalling molecules within to the cell to bind to the receptor and become activated.

Natural product methyltransferases provide a variety of inputs into metabolic pathways, including the availability of cofactors, signalling molecules, and metabolites.