Fig. 1

Media and phycocyanin production. a Cells were cultivated in BG11 medium and cell turbidities were measured at 618 nm (top). The sample was harvested after 30 days (arrow) and the absorption spectrum was measured from 250 nm to 830 nm (bottom). The positions of the maximum absorbance at 618 nm for phycocyanin, and at 435 nm and 680 nm for chlorophyll a, are shown with an arrowhead and asterisks, respectively. 5-3, ABRG5-3; 1-2-1, SK1-2-1; 39, NIES-39. b Cells were also cultured in SOT medium (top). The wave scan was performed using the same procedure as shown in (a) (bottom)