▁given ▁linear ▁mole c ule ▁can ▁start ▁at ▁any ▁location ▁on ▁the ▁circular ▁gen ome . ▁This ▁is ▁called ▁a ▁cy clic al ▁permut ation . ▁ ▁The ▁gen ome ▁is ▁especially ▁rich ▁in ▁Chi ▁sequences ▁recognized ▁by ▁the ▁b acter ial ▁recom bin ase ▁Rec BC D . ▁The ▁gen ome ▁contains ▁two ▁orig ins ▁of ▁rep lication : ▁or i R ▁which ▁rep licates ▁it ▁during ▁the ▁l ys ogen ic ▁cycle ▁and ▁or i L ▁which ▁rep licates ▁it ▁during ▁the ▁l yt ic ▁stage . ▁The ▁gen ome ▁of ▁P 1 ▁enc odes ▁three ▁t R N As ▁which ▁are ▁expressed ▁in ▁the ▁l yt ic ▁stage . ▁ ▁Prote ome . ▁The ▁gen ome ▁of ▁P 1 ▁enc odes ▁ 1 1 2 ▁prote ins ▁and ▁ 5 ▁un trans l ated ▁gen es ▁and ▁is ▁this ▁about ▁twice ▁the ▁size ▁of ▁b acter i oph age ▁lambda . ▁ ▁Life ▁cycle ▁ ▁In fection ▁and ▁early ▁stages ▁The ▁ph age ▁particle ▁ad s or bs ▁onto ▁the ▁surface ▁of ▁the ▁b acter ium ▁using ▁the ▁tail ▁fib ers ▁for ▁specific ity . ▁The ▁tail ▁she ath ▁contract s ▁and ▁the ▁DNA ▁of ▁the ▁ph age ▁is ▁inject ed ▁into ▁the ▁host ▁cell . ▁The ▁host ▁DNA ▁recom bin ation ▁mach in ery ▁or ▁the ▁cre ▁en zym e ▁translated ▁from ▁the ▁vir al ▁DNA ▁re comb ine ▁the ▁termin ally ▁redundant ▁ends ▁and ▁circular ize ▁the ▁gen ome . ▁Depending ▁on ▁various ▁phys i ological ▁c ues