Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Absorption spectra of the Synechocystis sp. PCC 6803 strains used in this work. Cells were grown as described in Materials and Methods to a chlorophyll concentration of 1 μg/ml. The nitrogen source used was ammonium (A) or nitrate (B). Spectra were recorded as described in Materials and Methods and normalized to an absorbance value of 0.5 at 437 nm.
