Table 2

Pigment contents of Synechocystis 6803 wild-type and mutants. Data before and after nitrogen starvation for 3 days at 80 μmol m-2s-1 as described in Experimental Procedures. Pigment concentrations and cell densities were estimated from absorption spectra. Values given are the means of three replicates, with standard deviations. Asterisks indicate pigment concentrations that were too low to be accurately determined. All media contained glucose.
Strain
 Chlorophyll/Cell (molecules × 106)
 Phycocyanin/Cell (molecules × 106)
 Chlorophyll/phycocyanin

+nitrate
 -nitrate
 +nitrate
 -nitrate
 +nitrate
 -nitrate
Wild-type
 13.6 ± 2.1
 *
 5.6 ± 1.4
 *
 2.4 ± 0.1
 *
pta
 12.6 ± 0.4
 *
 4.6 ± 1.5
 *
 2.7 ± 0.1
 *
dspA
 13.8 ± 0.1
 *
 5.9 ± 0.5
 *
 2.4 ± 0.1
 *
pta/dspA
 15.8 ± 0.9
 7.8 ± 0.5
 5.9 ± 0.5
 1.0 ± 0.2
 2.7 ± 0.2
 7.8 ± 2.3

Morrison et al. BMC Microbiology 2005 5:47   doi:10.1186/1471-2180-5-47