| Named after the blue-green pigment they use for this process, called phycocyanin, cyanobacteria also make oxygen and are given the credit for creating Earth's atmosphere about 2.4bn years ago. |
| Sea-dwelling cyanobacteria get their name from the bluish pigment, phycocyanin, which they use to capture light during photosynthesis. |
| Algae also have pigments such as carotenoids, xanthophylls and the phycocyanin providing coloring and play an important biochemical role. |
| These blue-green, one-celled microalgae are rich in carotenoids, including phycocyanin, the pigment that's responsible for spirulina's blue-green tint. |
| The vial on the left contains the bluish pigment phycocyanin, which gives the Cyanobacteria their name. |
| The time-course of the changes in the chlorophyll and phycocyanin contents was also followed. |
