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Phycocyanin measurement instruments

Phycocyanin is an accessory pigment to chlorophyll found predominantly in freshwater cyanobacteria (also known as blue-green algae). Phycocyanin has a characteristic blue colour (cyan is derived from the Greek κύανος for blue); it absorbs orange/red light and emits fluorescence around 650 nm in the red part of the spectrum. Phycocyanin essentially fills the spectral gap between the Chlorophyll absorption peaks in the red and blue. Yellow/orange light is absorbed by PC and the energy is transferred to Chlorophyll a molecules in the reaction centres of cells where photosynthesis occurs, enhancing spectral efficiency.