However, virally encoded PHO4 is hypothesized to enhance phosphate uptake during infection under phosphorus‐starved host growth (Monier et al.,2012), potentially alleviating limitation of an essential nutrient for replication of viral genomes, as has been observed for the PstS phosphate transport system expressed by cyanophages (Zeng and Chisholm, 2012). This evidence concerns the gene KLK4 and infection.