A 'one-tube' synthesis of a selective fluorescence 'turn off/on' DNA probe based on a C-phycocyanin-graphene oxide (CPC-GO) bio composite.

A naturally fluorescent protein, C-phycocyanin (CPC), was used as a fluorophore to study the effect of graphene oxide (GO) as a quencher. The protein was purified using established procedures and titrated with increasing GO concentrations. UV-visible titration showed a minor effect on the phycocyanobilin absorbance but significant interactions with the amino acid backbone.

C-Phycoerythrin as a Colorimetric and Fluorometric Probe for the Sensitive, Selective and Quantitative Detection of Cu in Aqueous Samples.

C-phycoerythrin (CPE) was investigated as a colorimetric and fluorometric quantitative sensor for Cu ions in an aqueous medium. UV - visible studies with 50 μM concentration of different metals were carried out with only Cu and Ag showing changes in the absorption spectra. Fluorescence emission studies showed similar results.