green flourescent proteins to gold nanoparticles with citric acid

pattern circle design art organ lighting pink red orange line symmetry green proteins gold nanoparticles citric acid isolated rendering black background fluorescent green aunp protein acid receptors sensing sensor therapy transducer fluorphores gfp gold biomedical engineering biomolecules biosensor biotechnology cancer cell chemical conjugation detection diagnosis isolated molecules nanoparticles nanoscience nanostructures nanotechnology photodynamic