Introduction phage biology Phage genome 48512 base pairs- 12 kB phage. jpg 10 kB Image removed due to copyright considerations See Ptashne, Mark. a genetic switch: phage lambda. 3rd ed. Cold Spring Harbor, NY. Cold Spring Harbor Laboratory Press, 2004Introduction phage biology Phage genome: 48512 base pairs ~ 12 kB ‘phage.jpg’ ~ 10 kB Image removed due to copyright considerations. See Ptashne, Mark. A genetic switch: phage lambda. 3rd ed. Cold Spring Harbor, N.Y.: Cold Spring Harbor Laboratory Press, 2004