Protein Kinase C Peptide Substrate targets specific cell spacers ina manner that is dependent on second messengers and specific adaptor proteins in response to extracellular signals that activate g protein-coupled receptors, tyrosine Kinase receptors, or tyrosine kinase-coupled receptors.

Methyl purple is an introduced quinone-imide redox dye that has been shown to be an exceptionally sensitive monitor of photosystem I activity in chloroplasts.

Tetrahydroxy-1,4-benzoquinone, also called tetrahydroxy-p-benzoquinone, tetrahydroxybenzoquinone, or tetrahydroxyquinone (THBQ, THQ), is an organic compound with formula C6O2(OH)4.