Figure 36-1: Genome organization of virulent phages c2 and sk1. The DNA sequence of c2 is obtained from (71), accession number L48605, while the DNA sequence of phage sk1 is obtained from (27), accession number AF011378. Arrows indicate the size and direction of transcription of open reading frames. Assigned functions are written above the open reading frames. Identified and putative promoters are indicated as small black arrows, while origins of replication are shown as a black box below the ORFs. The location of cos sites are indicated. Regions of the genome transcribed early, middle, or late in the infection cycle are marked with black lines below the genome.