N>
Normal. no DNA dam age
CeU distress a gnał - DNA damage indnces J&gsA <4 protea.se function >
P
Lg&^reprcttses ^
^ Ł®S& protein
ŁjSJ promoter
kxA
Ęg£^mactivates Łs*A protein
rSOS DNA repair gen es
repre&sed by LssA
protein are freed for expresńon
mrrĄ
Error-free DNA repair
Repressed SOS OKSJCfln
Error-pr one DNA repair
Active SOS operon