 This is done by inhibiting the host cells CO2 fixation, which enables the cyanophage to recruit photosynthetically formed redox and ATP from the host cell to meet their nucleotide and metabolic response.Many cyanophages contain genes known as viral-encoded auxiliary metabolic genes (AMGs), which encode critical, rate-limiting steps of the host organism.AMGs encode genes for the pentose phosphate pathway, phosphate acquisition, sulfur metabolism, and DNA/RNA processing; these genes interfere with the metabolism of the host cell.