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Complementation of the nblB-1 mutant phenotype. Absorbance spectra from 300 to 800 nm of strain hliNG and the nblB-1 mutant, and nblB-1C complemented strain grown in nutrient-replete medium (A) or exposed to either sulfur (B) or nitrogen (C) limitation for 48 h are shown. Peaks for phycocyanin (PC) and chlorophyll (Chl) absorbance are indicated with arrows. The curves were offset from each other to make it easier to identify the absorbance differences.
